Table of contents
The midlayer is arguably the most variable piece of your ski kit—and one you’ll want to dial in for every day on the mountain. Too little insulation and you’ll be cold; too much and you’ll quickly overheat (and likely fog up your goggles). Below, we break down the full range of midlayers for 2026, all of which have been thoroughly tested and selected by our team, with detailed notes on warmth, comfort, breathability, and more. As you compare, you can use our “sort by” tool to rank options based on your priorities.
Midlayer Superlatives
Arc'teryx Atom ($280)
REI Co-op 650 Down ($129)
Patagonia R1 Air ($165)
Senchi Designs A90 Half-Zip Hoodie ($115)
Patagonia Down Sweater ($289)
Mountain Hardwear Ghost Whisperer ($390)
Patagonia Nano-Air Light Hybrid ($249)
Our Midlayer Picks
It’s hard to go wrong with the minimalist Atom for almost any ski outing. This versatile layer pairs high-end construction with plenty of breathability and mobility, although it’s expensive for a synthetic piece, and its weather resistance isn’t fantastic for standalone backcountry use.
It’s hard to go wrong with the minimalist Atom for almost any ski outing. This versatile layer pairs high-end construction with plenty of breathability and mobility, although it’s expensive for a synthetic piece, and its weather resistance isn’t fantastic for standalone backcountry use.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
60g Coreloft Compact
Weight
11.8 oz.
Fabric
20D nylon
Other Styles
Hoody, vest
Pros
Cons
The Atom proves that quiet luxury isn’t just the domain of high fashion. This synthetic jacket is one of the most minimalist-minded midlayers we’ve tested, and its design doesn’t have the panache of something like the Patagonia Nano Puff or the down-filled Mountain Hardwear Ghost Whisperer. However, the Atom’s understated looks belie its excellent comfort. The light nylon face fabric has the feel of your favorite sweatshirt rather than a techy jacket, and both it and the Atom’s fleece side panels offer excellent stretch. You can get low while carving, reach high for a pole plant on a kick turn, or just bum around town in this jacket without ever feeling constricted. Arc’teryx’s design quality is on full display here, too—and it better be, given the Atom’s price, which is not one of its better qualities.
Besides comfort, you’re also paying for a jacket that you can wear as a resort layer and as an active backcountry touring piece. The Arc'teryx Atom’s fleece side panels effectively shed heat, as does the relatively thin shell fabric. Our tester wore it on a snowshoe trip to the Snow Bowl Hut in Washington, and he never overheated despite laboring through whiteout conditions. (A note on weather resistance: The Atom’s durable water-repellent finish doesn’t hold up to anything more than light precipitation, so have a shell ready if you’re touring in inclement conditions.) While it's not quite as breathable as the Patagonia Nano Air Light Hybrid, which has a full fleece back, this jacket keeps you covered on the uphill and slides nicely beneath a shell on resort days.
We found the Atom comfortable from about 20°F to 50°F through activities ranging from high output to low effort. It delivers warmth that’s a touch below that of the Nano Puff and heavier synthetics, but as part of an in-bounds layering system, it should keep you cozy most of the time. The only real drawback we’ve noticed is the main zipper, which has an annoying tendency to come undone if you haven’t closed it all the way to the top. That’s a puzzler given Arc’teryx’s usually rigorous design standards, and even more so when you consider the Atom’s price. But it’s all far from a dealbreaker, especially given that this jacket should fit the bill for most of your skiing needs. For a deeper dive, read our review of the Arc'teryx Atom.
The 650 Down Jacket took us by surprise. For a price that’s less than half of most down midlayers we’ve tested, it delivers an impressively high level of comfort. However, it’s not as warm as higher-end competitors, and the boxy cut can make it a bit tricky to layer cleanly under a shell.
The 650 Down Jacket took us by surprise. For a price that’s less than half of most down midlayers we’ve tested, it delivers an impressively high level of comfort. However, it’s not as warm as higher-end competitors, and the boxy cut can make it a bit tricky to layer cleanly under a shell.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
3.5 oz. of 650-fill down
Weight
10.9 oz.
Fabric
Nylon
Other Styles
Hoody (men's only)
Pros
Cons
If you’re wary of REI’s affordable takes on big-budget gear, let us put you at ease. The 650 Down Jacket is much nicer than its price would suggest, and we’d put it up against competitors that cost two or three times as much. To wit: The 650 costs $150 less than the venerated Patagonia Down Sweater, but its smooth, soft nylon face fabric is nearly as luxurious. (The Down Sweater comes out a nose ahead due to having fluffier, 800FP insulation.) The 650’s collar is soft, and our tester praised the cropped, boxy cut as looking flattering whether the jacket was zipped or unzipped. However, even though she layered it under a shell, we recommend that you test the 650’s ability to slide under your ski outerwear, given its more generous cut than trimmer alternatives.
At just 10.9 ounces, the REI Co-op 650 is light enough for mellow tours and hikes, and packable enough that our tester even brought it along on some chilly trail runs. So, what’s the catch? The most significant compromise is warmth. With only 3.5 ounces of down fill, it runs noticeably cooler than the Down Sweater, which features 5 ounces of higher-quality down, and is more in line with a synthetic piece like the Nano Puff. That said, this middle-ground insulation might hit the sweet spot for average resort conditions—and, when paired with an insulated shell, it can serve as a capable, cost-effective winter layering system.
In light rainfall, we found that the 650’s nylon shell and durable water-repellent coating tend to wet out more quickly compared to pricier models with more protective fabrics like Pertex Quantum or Quantum Pro. That’s no surprise at this price point—and realistically, no one’s counting on this jacket alone in inclement weather. But let’s end on some high notes: With two hand pockets and two internal drop pockets, the 650 offers impressive storage for a jacket that costs less than half as much as the synthetic Arc’teryx Atom ($280 and no drop pockets). It also comes in 10 sizes for men and eight for women—far more than any other down midlayer we’ve tested. Just one more reason this jacket stands out as a true hidden gem. To learn more, check out our REI Co-op 650 Down review.
With a design that grants warmth, comfort, and breathability in almost equal amounts, the R1 Air Jacket is one of our favorite do-it-all fleeces. It’s easy to choose for a day on the lifts or in the backcountry, although it leans more on the active side of things if you’re looking for a super-cozy midlayer.
With a design that grants warmth, comfort, and breathability in almost equal amounts, the R1 Air Jacket is one of our favorite do-it-all fleeces. It’s easy to choose for a day on the lifts or in the backcountry, although it leans more on the active side of things if you’re looking for a super-cozy midlayer.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
Fleece (162g)
Weight
12 oz.
Fabric
100% polyester
Other Styles
Hoody, crew, quarter-zip, vest
Pros
Cons
The R1 Air Jacket takes its place alongside the Arc’teryx Atom and the Patagonia Down Sweater Jacket as one of the most versatile midlayers we’ve tested. This fleece is an active insulation piece at its core, and its zigzag-textured fabric creates channels for airflow, making it suitable for moderate-effort skinning in cold weather or shoulder-season hikes when there’s no snow to be found. It’s not quite as breathable as lighter options like the Outdoor Research Vigor Grid, but the R1 Air’s superior warmth-to-weight ratio makes it more versatile in cold temps. It functions better than the Vigor Grid as a midlayer to wear under a shell and perhaps a light puffy on cool-to-cold resort outings, and if you decide to put in a bootpack, it will hopefully prevent you from swamping out.
The slim-fitting Patagonia R1 Air might seem minimalist on the surface, but it contains some useful features. Zippered hand pockets and a small zippered chest pocket enhance its functionality, though we’d prefer it came with thumb loops (as the Vigor Grid does). A high collar helps seal out drafts, and the stretchy fabric makes it easy to layer over or under other pieces. If pure warmth is your goal, we’d probably go with something more akin to the heavier, less breathable Patagonia Synchilla, or a synthetic or down jacket. But it’s hard to beat the R1 Air if you want your fleece to be useful for all of ski season and not just the coldest days, as well as hiking, climbing, and biking when the weather gets warmer. For more, check out our review of the R1 Air Hoody.
The Senchi Designs A90 is an ultralight fleece that balances warmth and airflow better than almost anything else, thriving in high-output settings like ski touring. It’s thin, technical, and pocket-free, but paired with a wind shell, this stripped-down layer covers an impressive temperature range for backcountry missions.
The Senchi Designs A90 is an ultralight fleece that balances warmth and airflow better than almost anything else, thriving in high-output settings like ski touring. It’s thin, technical, and pocket-free, but paired with a wind shell, this stripped-down layer covers an impressive temperature range for backcountry missions.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
Fleece (90g)
Weight
4.9 oz.
Fabric
100% polyester
Other Styles
Half-zip crew
Pros
Cons
The Senchi Designs A90 is the darling of the ultralight community, and for good reason: at under 5 ounces, it’s one of the lightest fleeces on the market and delivers an unbeatable balance of warmth and airflow. Built from Polartec Alpha Direct, the A90 thrives in high-output settings like ski touring, trail running, or fast-and-light alpine climbs. The fabric wicks moisture exceptionally well, dries quickly, and pairs perfectly with a shell for a versatile layering system. While not as cozy or warm as traditional fleeces, its featherweight build and breathability make it one of the best performance-first options for moving fast in the mountains.
Comfort and mobility are standout strengths. The A90’s soft, fuzzy fabric feels great next to skin, and its trim but unrestrictive fit layers easily under a shell without bunching or adding bulk. The minimalist design shines in this role: the scuba-style hood tucks neatly under a shell or helmet, and the absence of pockets or extras is barely noticeable when paired with functional outer layers. It doesn’t offer the plush coziness of heavier fleeces like the Patagonia R1 Air, but its barely-there feel makes it a piece you’ll forget you’re wearing until you realize how well it’s working.
The tradeoffs are clear: this is not a fleece for sitting on a frozen chairlift or strolling around town. The A90 is thin, wind-vulnerable, and unapologetically technical, with a stripped-down look that won’t win many après points. But for backcountry skiers, ultralight backpackers, and anyone chasing efficiency, it’s a near-perfect companion. Pair it with a shell, and the A90 covers an incredible temperature range for active use—earning its spot as one of the most specialized yet effective midlayers we’ve tested. For a deeper dive, read our review of the Senchi Designs A90.
This popular jacket boasts decent-to-great performance across the board. The Down Sweater is fairly warm, deliciously comfortable, and stylish enough to wear to dinner. It’s not as technically oriented as some competitors, though.
This popular jacket boasts decent-to-great performance across the board. The Down Sweater is fairly warm, deliciously comfortable, and stylish enough to wear to dinner. It’s not as technically oriented as some competitors, though.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
5 oz. of 800-fill down
Weight
13 oz.
Fabric
20D nylon
Other Styles
Hoody, vest
Pros
Cons
As far as lightweight down midlayers go, it’s hard to beat the Down Sweater for all-around appeal. It’s warm enough to throw over a base layer and under a shell for resort days in properly frigid temps (down into the low teens for some of our testers). It’s also light (13 oz.) and compressible enough to cram at the bottom of your ski pack and use as a snack-and-summit puffy on moderate tours. However, the Down Sweater’s regular cut and understated, not-super-technical look make it just as at home in camp (both in the front- and backcountry) as it is while you browse for a well-earned bite and beer. This jacket won’t blow you away in any one area performance-wise, but you probably won’t need much else for day-in, day-out wear during the ski season.
Speaking of all-day wear, the Patagoina Down Sweater’s materials make it a jacket you’ll want to wear as often as possible. Our tester found it luxuriously soft and cozy, without the overly puffy, Michelin Man feel that plagues some down jackets. The 20-denier nylon strikes a nice balance: it feels silky to the touch yet offers enough durability for skiing, hiking, and everyday wear. (For context, it’s twice as thick as the 10-denier fabric used on the ultralight 8-oz. Mountain Hardwear Ghost Whisperer.) Despite weighing under a pound, the Down Sweater also delivers on storage, with zippered hand pockets, a zippered chest pocket, and roomy internal drop pockets. It’s a well-built, thoughtfully designed piece that justifies its price tag—though the hooded version will run you $345.
What the Down Sweater is not is a super-warm or crazy-light midlayer. A model like the Norrøna Lyngen Pro offers better insulation thanks to containing an ounce more of 850-fill down, and competitors such as the Ghost Whisperer are more attractive if pack space is at a premium or you’re heading out for a multi-day trip. But both those jackets are more expensive and less suited to carefree resort laps or hanging out after the lifts stop spinning. That’s where the Down Sweater earns its reputation: It’s cozier than a synthetic, offers top-notch build quality, and always seems to be the right tool for the (non-technical) job. For a deeper dive, read our Patagonia Down Sweater review.
The Ghost Whisperer may be a true ultralight jacket, but don’t mistake it for a one-trick puffy. This midlayer is more versatile than you might think—just make sure you take good care of it, lest you spill its precious down contents across the snow.
The Ghost Whisperer may be a true ultralight jacket, but don’t mistake it for a one-trick puffy. This midlayer is more versatile than you might think—just make sure you take good care of it, lest you spill its precious down contents across the snow.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
2.4 oz. of 800-fill down
Weight
8 oz.
Fabric
10D nylon
Other Styles
Hoody, vest
Pros
Cons
The Ghost Whisperer is right up there with the Patagonia Down Sweater as one of the standard bearers of the down midlayer category, but for very different reasons. Whereas the Down Sweater made its name for comfort and broad appeal, the Ghost Whisperer helped sharpen the ultralight mentality in the down-jacket market. It weighs only 8 ounces and it packs down smaller than a 1-liter Nalgene, making it suitable for toting anywhere you can squeeze it into a fissure in your pack or hang it from your harness. (The Ghost Whisperer helpfully packs into one of its hand pockets.) If you decide to take it on a ski tour to use as an emergency layer, you’ll barely notice you’re carrying it. The same goes for using it on a backpacking trip or on a mountaineering mission.
If you do take the Ghost Whisperer into the alpine—or decide to wear it around town—you’ll have to be mindful of its delicate constitution. One of the ways Mountain Hardwear made this jacket so dang light is outfitting it with a tissue-like 10-denier nylon face fabric. Scraping it against a rock or snagging it on a branch could result in white material other than snow flying through the air, which is somewhat annoying when you consider how much this jacket costs. Still, that’s the price you pay for supreme packability—make sure to protect your investment and bring gear patches just in case.
The Ghost Whisperer’s warmth-to-weight ratio is relatively high thanks to its 800-fill down, but overall it’s not a super-warm jacket. Our tester recommended wearing it solo for temps from roughly the high 40s to the low 60s, but you can, of course, push it lower than that if you layer below and above it as part of a ski kit. If that’s the case, we think it works best as part of your warm-weather resort skiing loadout or as a summit puffy as you chase spring corn. (It’s also a good choice if you run hot and don’t want to swelter in something like the Down Sweater or a heavy synthetic midlayer.) Features-wise, the Ghost Whisperer doesn’t provide much—just the two hand pockets—but if you’re going this light, you’re more concerned about shaving ounces than you are with where you stash your chapstick. For more, check out our review of the Ghost Whisperer.
The Nano-Air Light Hybrid is one of the most breathable synthetic midlayers around. This piece is primed for lung-busting backcountry tours, but its single-minded construction means it lags behind competitors in terms of warmth and weather resistance.
The Nano-Air Light Hybrid is one of the most breathable synthetic midlayers around. This piece is primed for lung-busting backcountry tours, but its single-minded construction means it lags behind competitors in terms of warmth and weather resistance.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
40g FullRange, R1 Air fleece
Weight
10.5 oz.
Fabric
30D polyester
Other Styles
Hoody, vest
Pros
Cons
When Patagonia shelved the original Nano-Air Light Hybrid, the company dealt a blow to uphill enthusiasts everywhere. The jacket has been back for a few years now, though, so the backcountry skiers among us can breathe easy—in this case, literally. The Nano-Air Light Hybrid is one of the airiest synthetic layers we’ve tested, thanks to a design that places Patagonia’s well-loved R1 Air fleece material across the entirety of the jacket’s back, sides, and underarms. We found that the construction shines when you’re huffing and puffing, as when one Better Trail editor wore the Nano-Air Light Hybrid on a springtime ascent of the Middle Teton. He never felt too swampy as he booted up the southwest couloir in 20-degree weather, which ensured he didn’t get overly chilly on the summit before skiing down the peak’s classic east face.
The Nano-Air Light Hybrid’s breathability is boosted by its 40-gram synthetic insulation, which is a good deal lighter than the 60-gram variety found on competitors such as the Arc’teryx Atom and the Patagonia Nano Puff. However, it also makes the Nano-Air less warm than those jackets, so while you can easily layer it under a shell for a resort skiing day (its polyester face fabric is both comfy and smooth), you might feel chilled if temperatures are low, you run cold, or are standing around on the slopes. The resort isn’t really what this jacket is built for. In the skin track, though, the Nano-Air Light Hybrid moves smoothly with every step and kick turn, and its low-profile design—only two shallow hand pockets here—makes it light enough to throw in your pack (albeit bulkier than a compressible down midlayer like the Mountain Hardwear Ghost Whisperer).
We’ve found the Nano-Air Light Hybrid’s 30-denier polyester face fabric to be durable across a few full seasons of high-alpine use, although the R1 Air fleece tends to lose a bit of its fluff over time. It’s also not built for extended wear in much more than a light, cold flurry. Finally, this jacket is fairly expensive for a specialized piece, though you might have already gathered that it excels at what it’s meant to do. If you spend more time knocking out vert than you do riding lifts, the Nano-Air Light Hybrid is one of the best active insulation options on the market today. For more, read our review of the Patagonia Nano-Air Light Hybrid.
Stretchy, breathable, light, and packable, the Atom SL is built for moving fast in cool temps. It also blocks wind surprisingly well; however, its lack of warmth makes it a fairly specialized active piece.
Stretchy, breathable, light, and packable, the Atom SL is built for moving fast in cool temps. It also blocks wind surprisingly well; however, its lack of warmth makes it a fairly specialized active piece.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
40g Coreloft Stretch, fleece side panels
Weight
9.9 oz.
Fabric
20D nylon/elastane
Pros
Cons
Just because there’s snow on the ground doesn’t mean that you should stop getting after it—and for lung-busting cold-weather efforts, there are few jackets better than the Atom SL. This is the lightest and most breathable jacket in Arc’teryx’s popular Atom midlayer line, and its 40-gram Coreloft Stretch insulation retains less heat than the regular Atom’s 60-gram fill or the heavyweight Atom SV’s 120-gram material. Yes, that means the SL isn’t the pick if you want to stand around in town or at camp (or even move at a modest pace) when the thermometer falls below about 40 degrees. But for trail runs, ski tours, and fast hiking in late shoulder-season or winter conditions, it provides just enough warmth without making you overheat.
As you can probably guess, the Atom SL’s breathability is excellent. It's among the best in the category, aided by uninsulated fleece side panels and a woven nylon shell fabric that lets heat and perspiration dissipate, even when you’re working up a sweat. Wearing the SL, our tester embarked on steep trail runs on a trip to Chamonix and never felt too clammy when he wore it over a merino wool baselayer.
The SL’s wind protection deserves mention as well. Its woven nylon/elastane face fabric does a superb job of blocking the breeze, and our tester found himself wearing it like he would a non-insulated wind jacket in gusty weather—it’s that breathable and comfortable. Plus, with a look that transitions well from trailhead to coffee shop (as our tester also noted), the Atom SL is one of the most versatile midlayers we’ve tested. Keep it in its super-active lane, and its high price—which is a bit much, to be honest—might feel like a bargain as the adventures pile up. For more, read our full review of the Atom SL.
With performance that outpunches its price point, the Cirrus Flex presents one of the best deals of any synthetic jacket we’ve tested. This hybrid piece is well-rounded and feature-filled, although it doesn’t provide top-tier warmth and the fit runs small.
With performance that outpunches its price point, the Cirrus Flex presents one of the best deals of any synthetic jacket we’ve tested. This hybrid piece is well-rounded and feature-filled, although it doesn’t provide top-tier warmth and the fit runs small.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
PrimaLoft Silver Rise
Weight
13.7 oz.
Fabric
20D Pertex Quantum
Other Styles
Hoody
Pros
Cons
We get it: Spending a ton of money on a layer that mostly hides beneath your ski shell can seem a bit silly. A major part of the Cirrus Flex’s appeal, though, is that it offers solid performance at a price that’s $50 to $100 less than much of the competition. Like the high-end Arc’teryx Atom, the Cirrus Flex features fleece side panels that regulate heat. While we wouldn’t consider it a true active insulation piece—it’s not as breathable as the Atom or something like the Patagonia Nano-Air Light Hybrid—the construction is nice if you run warm in the resort or push the jacket into hiking or climbing duty.
The majority of the Rab Cirrus Flex is insulated with PrimaLoft Silver Rise, which doesn’t offer quite the same premium warmth as PrimaLoft Gold Eco. Paired with lightweight fleece along the sides, the Cirrus Flex is best worn over a heavyweight base layer and under a thick shell or insulated outer on truly cold resort days. That said, it stands out for its mobility—the stretchy side panels and trim fit provide excellent range of motion wherever you wear it. Just keep in mind that, like many Rab pieces, it runs a bit small, so you may want to size up.
The Cirrus Flex also delivers on features, which is another win at this price point. We liked the soft fleece chin guard and appreciated the addition of internal dump pockets. Its Pertex Quantum shell provides above-average water resistance, though the fleece panels slightly detract from it. It’s also a bit heavier and bulkier than some alternatives, making it better suited to shorter tours or day hikes rather than longer outings that require a tightly packed kit. That said, the Cirrus Flex handles casual use and resort ski days with ease—all while leaving a little extra cash for après activities. For more, read our review of the Rab Cirrus Flex Insulated.
The Nano Puff is a category stalwart, thanks to its mountain-to-town appeal and high build quality. However, it doesn’t stand out in any one area, and its warmth-to-weight ratio isn’t that impressive.
The Nano Puff is a category stalwart, thanks to its mountain-to-town appeal and high build quality. However, it doesn’t stand out in any one area, and its warmth-to-weight ratio isn’t that impressive.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
60g PrimaLoft Gold Eco P.U.R.E.
Weight
13 oz.
Fabric
20D polyester
Other Styles
Hoody, vest
Pros
Cons
If you haven’t already worn the Nano Puff, we’re sure you’ve seen it around. You may have spied it on a hiking partner in camp, or on a stranger strolling through town on a cool day, or stashed in your buddy’s pack at the crag. That’s because this jacket boasts a broad appeal that has just as much to do with its looks as its performance. The Nano Puff’s clean lines and understated, not overly crunchy look allow it to blend in at the lodge, while also sliding smoothly over a base layer and under a shell. (The latter two are aided by its relatively low bulk and svelte fit.) If this review sounds somewhat superficial so far, remember that skiing is fun—so wearing a jacket that you’ll want to continue having fun in when you take your boots off is nothing to sniff at.
This isn’t the warmest midlayer in this gear guide—that distinction goes to down-filled models such as Patagonia’s Down Sweater Jacket—but the Nano Puff slots in near-perfectly for typical inbounds days. Our tester found it warm on its own down to about 50 degrees in backpacking situations, but it should work fine for most folks in “normal” skiing weather in the 20s and 30s (as always, take into account if you run hotter or colder).
We found that you can reliably wear the Nano Puff for downhill skiing, backpacking, climbing (the low bulk and roomier shoulder fit compared to its previous iteration provide good mobility), and the aforementioned decompression sessions. However, it’s not nearly breathable enough for backcountry skiing. If dumping heat during cardio-intensive activities is high on your list, opt for the Patagonia Nano-Air Light Hybrid Jacket or—if you’re really cranking the heat up—a lightweight fleece. For skiers who stick to the resort and then hit the town afterwards, though, the Nano Puff gets the job done with aplomb. To learn more, read our Patagonia Nano Puff review.
The Vigor Grid is one of the best fleeces we’ve tested for high-output activities. Despite its lightweight build, it’s more durable than you might expect—but with that lower weight comes less warmth, which could be a drawback on especially cold or low-exertion ski days.
The Vigor Grid is one of the best fleeces we’ve tested for high-output activities. Despite its lightweight build, it’s more durable than you might expect—but with that lower weight comes less warmth, which could be a drawback on especially cold or low-exertion ski days.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Insulation
Fleece
Weight
9.4 oz.
Fabric
Fleece (94% polyester/6% elastane)
Other Styles
Hoody, quarter-zip (women’s only), pullover
Pros
Cons
If “ski midlayer” means “active layer” in your book—we’re guessing you spend more time in the skin track than on chairlifts—then the Vigor Grid deserves a spot on your radar. It’s thinner and more breathable than synthetic options like the Arc’teryx Atom or the Patagonia Nano-Air Light Hybrid, making it a great choice for uphill-heavy days. That was our tester’s logic on a steep spring snowshoe in the Cascades, with temps ranging from 20 to 40 degrees. The Vigor Grid kept her warm enough at the lower end of that range and doubled as an outer layer as temps rose. For cardio-intensive outings, this is one of the first fleeces we’d reach for.
The Vigor Grid can slide under a jacket quite well, helped by thumb holes and a trim—but not too slim—cut. (It also has a zippered chest pocket to round out its just-right feature set for a fleece this light.) However, it might not work as well as a resort layer. Fitting a heavy base layer underneath could be a chore, and on a super cold day, that’s what you’d want to do, as the Vigor Grid is less warm than most of the other fleeces in this gear guide (not to mention all the down and synthetic alternatives). No matter how you wear it, you can rest (and ski) assured that the soft, stretchy fabric will feel great. Plus, it’s hard to go wrong with a fleece that will set you back about $100 and breathes almost as well as your touring-conditioned lungs. For more, read our review of the Outdoor Research Vigor Grid.
Compare Midlayers
It’s hard to go wrong with the minimalist Atom for almost any ski outing. This versatile layer pairs high-end construction with plenty of breathability and mobility, although it’s expensive for a synthetic piece, and its weather resistance isn’t fantastic for standalone backcountry use.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
The Nano Puff is a category stalwart, thanks to its mountain-to-town appeal and high build quality. However, it doesn’t stand out in any one area, and its warmth-to-weight ratio isn’t that impressive.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
The Nano-Air Light Hybrid is one of the most breathable synthetic midlayers around. This piece is primed for lung-busting backcountry tours, but its single-minded construction means it lags behind competitors in terms of warmth and weather resistance.
Warmth
Comfort & Mobility
Breathability
Versatility
Durability
Sustainability
Our Testing and Team
With more than four decades of outdoor gear review experience among our founding team and an ever-growing crew of testers with diverse backgrounds and equally deep knowledge, you can trust the authority behind our reviews. To put together our midayer gear guide, we tapped our entire testing team—from backpackers and hikers to trail runners, skiers, and climbers—to get a wide range of input across conditions and output levels. The result is a thoughtful guide with recommendations that span the full spectrum of use cases. And while our top picks reflect our current favorites, they’re just a snapshot of our broader testing, which includes well over 100 midlayers worn and compared across the team.
Highlights from Better Trail’s midlayer testing:
- The Patagonia R1 Air might take the cake as the easiest testing assignment we’ve ever handed out—at one point, four members of the Better Trail team hopped on a Zoom call and realized they were all wearing it. What’s more, our co-founder John Ellings has been a fan since its inception, putting both the first and second iterations through extensive use, including dozens of wash cycles—which, if you know fleece, is a key part of long-term testing.
- Tester Jonas Hill—a trail runner, climber, backpacker, photographer, and overall good guy—has worn the Senchi Designs A90 for four years. It’s been with him backpacking in Norway, ski touring in Colorado, trail running in the Alps, climbing Kilimanjaro, and on countless smaller adventures in between.
- In a head-to-head breathability test, Mikhail Martin and Steffen Jean-Pierre compared the Patagonia Nano-Air Light Hybrid and Arc’teryx Proton along a section of the Appalachian Trail in New York.
- Colorado-based tester Jade Downing has logged time in both the current Patagonia Nano Puff and its previous iteration, taking each to the summits of multiple fourteeners and offering valuable insight into how the updated version stacks up.
Our Ratings Explained
When assigning a midlayer’s overall score, we take a holistic approach that’s informed by the product’s key traits. These traits match up with our individual score categories—warmth, comfort, breathability, durability, and versatility—and we also pay close attention to price and value. An overall score is not an average of those individual categories, but it is the simplest way to tell if a midlayer is worth purchasing—one with a high score is a great piece of gear, while there are serious question marks around those with lower scores.
Because the midlayer category is relatively varied and complex compared to other gear types, you’d do well to read our full reviews to get a sense of which products might excel in one category despite having an overall score that might not seem impressive on the surface. (For example, the REI Co-op 650 Down doesn’t stand out at first glance, but it presents a laudable level of warmth for its rock-bottom price.) When in doubt, though, we generally advise our readers to buy products that have high overall scores rather than lower ones.
In many readers’ minds—and in ours, if we’re being honest—warmth is a midlayer’s most important characteristic. After all, most of the time we’re reaching for a midlayer, it’s because we’re outside in the cold. None of the midlayers in this guide offer the unbreachable insulation of a heavyweight belay parka; rather, they’re meant to be used as part of your layering system, worn over a base layer and under a shell. However, the products we’ve reviewed span a wide range of warmth, from high-scoring down-filled jackets and heavy synthetics to lighter, less insulating fleeces built for active use. Whether you’ll find a midlayer too warm or too cold also relies heavily on your personal preference and activity level, so keep that in mind when you assess scores in this category.
The warmest jackets that we’d want to wear under an outer layer on a cold resort ski day. They usually contain a large amount of 800 fill or higher down or 80-gram-and-above synthetic insulation.
Less toasty models with less (and less lofty) down, or synthetic fill in the 60-gram or so range. These midlayers are usually more versatile and can be pushed into active use.
This is the domain of fleeces and thin, light active insulation that won’t keep you very warm.
Besides warmth, this category probably has the greatest influence on whether you’ll reach for a given midlayer again and again or leave it in your closet in search of something better. After all, you might as well feel comfortable if you’re swaddled in all these protective layers, right? Fabric feel contributes significantly to comfort, along with fit and freedom of movement. You should also be aware that a midlayer may give up some comfort (especially in the coziness department) in the name of breathability, durability, or weight savings, but that doesn’t mean a light fleece jacket can’t be made from materials that feel great.
You’ll never want to take these midlayers off. Think soft, smooth materials, lofty insulation that seems to cradle you, and thoughtful touches such as thumb loops and chin zipper garages. They feel natural to wear without compromising your movement.
You can certainly tolerate these models over a full ski day, although they don’t boast the same wow factor as the category’s top performers.
Pieces that are not pleasant to wear, perhaps due to low-quality materials or odd fits.
The stock you put into breathability depends on your level of activity. If you’re spending much of your time riding lifts in the resort, the ability of a midlayer to shed heat and mitigate sweat buildup is less important than if you’re a backcountry veteran who sets the local skin track after every storm. For the latter use case (or, if you’re not the town hardo, for normal touring and winter hiking purposes), light fleeces with unlofted insulation are the big winners. Synthetic jackets—especially ones with sweatshirt-like shell fabric—also fare well, while down jackets and down-like synthetics are on the “not breathable” side of the spectrum and really shouldn’t be worn if you’re putting in any type of effort.
These midlayers—usually fleeces or hybrid synthetic/fleece jackets—are extremely airy and allow you to max out your heart rate without feeling too swampy. They’re designed for ski touring in the winter and high-output cardio the rest of the year.
These models don’t shed heat as efficiently. They’ll work on a moderate-paced tour or a short bootpack, but you might boil over on anything more intense than that.
Here we find heavy midlayers that trap a lot of heat—they’re great for staying warm, but you won’t enjoy working hard in them.
We don’t usually score for versatility, but midlayers are a prime category for it. This metric captures how many different roles a jacket can play: Is it a one-trick winter insulator like the REI Co-op Trailmade, or does it span a wide temperature range—say, from 30°F trail runs to 60°F hikes—like the Senchi Designs A90? Versatility also extends to everyday use: can you wear it comfortably as a standalone piece around town (Arc'teryx's Atom), or is it destined to live only in your ski kit (Patagonia Nano-Air Hybrid)? We see this as tied to sustainability, too—if one midlayer can cover a broad range of conditions and settings, that’s one fewer jacket that needs to be made.
These are midlayers that adapt well to a wide range of settings and conditions, whether through an impressive temperature range—often aided by breathability—or a design that looks just as good in casual settings as it performs in the mountains.
So-so versatility. You’ll reach for these midlayers for a few different reasons, but they’re not the kind of piece you’ll want to do everything in.
These are purpose-built midlayers—masters of one, not jacks of all trades. They excel in a specific category but aren’t the kind of layer you’ll reach for every day.
Because many midlayers use lofted insulation or fabrics that are more delicate than the rest of your ski kit, we place a high value on those that can hold up over many seasons. Durability isn’t just good for your wallet—it’s also better for the environment. None of the jackets in this guide is as tough as a shell or leather ski gloves, but some clearly outlast others. If you’re hard on gear and plan to wear your midlayer often as a standalone piece, the durability rating is worth close attention. On the other hand, if you’re buying a midlayer strictly to layer under a shell, you can get away with something less robust.
These midlayers can survive the rigors of a ski season (and beyond), even when worn as an outer layer. They have relatively thick materials for the category and high construction quality.
While you don’t exactly have to baby these models, they have thinner fabrics compared to top-ranked midlayers and can tear with careless use.
You have to take extra care of these midlayers to ensure they don’t rip. A strong gust of wind might do the trick, though.
Because the midlayer category includes down, synthetic, and fleece jackets, our sustainability analysis varies slightly across models. All jackets are judged on common criteria—such as recycled or Bluesign-approved materials, responsible manufacturing, carbon tracking, and reduced or recycled packaging—but each category has its own nuances. For instance, we check whether down pieces use responsibly sourced down, and synthetic jackets are assessed for PFAS-free DWR, while fleece jackets are not. In general, sustainability scores can be compared across the board, but keep in mind there are some category-specific differences behind the numbers.
These midlayers are among the most sustainable on the market and earn our Better Trail Certified distinction. They often meet most of our sustainability criteria for this category.
These midlayers are good, middle-of-the-pack options in terms of sustainability. They often meet at least half of our criteria for this category.
These midlayers are the least sustainable models available and have significant room for improvement. They usually only meet about a quarter or less of our criteria.
Anatomy of a Midlayer
Before we dive into anatomy minutiae, it’s helpful to first break down the three major types of midlayers. Each occupies its own performance niche within the category, and all have their pros and cons.
Down Jackets
Down jackets offer the best warmth-to-weight ratio of the three midlayer types, thanks to down’s exceptional loft, heat-trapping ability, and packability. They’re also among the most comfortable options—there’s nothing quite like wrapping yourself in soft feathers held neatly in place by baffles. The trade-off is breathability: down is less air-permeable than synthetic or fleece, making these jackets less ideal for high-output activities like skinning or uphill hiking.
Fill power is another key factor. Higher fill power means greater loft, warmth for the weight, and compressibility (for more, read our deep dive on fill power). Most midlayers range from about 600-fill down on the budget end (like the REI Co-op 650 Down Jacket) to 800-fill and above for premium models such as the Patagonia Down Sweater or Mountain Hardwear Ghost Whisperer. Some cutting-edge pieces, like the Rab Mythic G, push as high as 1000-fill down—offering incredible performance, but at a price that matches (the Mythic G retails for $525).
Synthetic Jackets
Synthetic insulation is a lofted polyester fill that, like down, traps warm air to keep you comfortable. These midlayers are usually a bit less lofty than their down counterparts and can feel less plush as a result, though many come with soft, sweatshirt-like shells that make them easy to wear all day (e.g., the Arc’teryx Atom). The trade-off is efficiency: synthetic insulation isn’t as warm for its weight, so jackets that rival down in warmth tend to be heavier, bulkier, and less packable. Warmth is typically measured in gram-weight, with 60-gram fills running warmer than lighter 40-gram options.
Where synthetic shines is in performance and value. It’s generally more breathable, more water-resistant, and less expensive than down, making it a top choice for active pursuits like backcountry skiing and climbing. The Patagonia Nano-Air Light Hybrid shines as an active insulator, combining synthetic insulation with fleece. Synthetic insulation also retains loft much better when wet, so it’s the smarter pick in persistently damp conditions. And while prices have crept up over the years, synthetic jackets remain far more affordable than premium down. For all-around versatility, it’s hard to beat this category (and to hear more of the debate, read our article on Down vs. Synthetic Jackets).
Fleece Jackets
Fleece jackets don’t use lofted insulation like down or synthetic jackets. Instead, they rely on fabric thickness and composition to provide warmth—though in general, they’re much less insulating than puffies. (For a deeper dive into the different types of fleece, check out our Best Fleece Jackets guide.)
What fleeces lack in outright warmth, they make up for in practicality. The low bulk of a performance fleece (like the Patagonia R1 Air or Senchi Designs A90) makes it easy to layer under shells or heavier midlayers, and they’re by far the most breathable option, offering just enough insulation while allowing excess heat to escape. This makes fleeces ideal for high-output activities like ski touring or cold-weather running, where temperature regulation is key. On the other hand, casual fleeces are highly versatile and can get the job done both on and off the mountain. And with price points much lower than most synthetic or down alternatives, fleece midlayers also represent one of the better values in the category.
Insulated Jacket Shell Fabric
Both down and synthetic midlayers are wrapped in an outer material commonly called the shell (or face) fabric. Nylon and polyester are by far the most common, with wool making the occasional appearance (see our FAQ on wool midlayers below). These fabrics can be woven or non-woven: woven shells save weight and improve weather resistance, while non-woven versions offer a softer hand feel and better breathability.
Durability largely comes down to thickness, measured in denier (abbreviated “D”). Higher denier fabrics are thicker and more durable, while lower deniers save weight at the expense of toughness. Most midlayers in this guide use 20D or 30D shell fabrics, which is about standard for lightweight puffies. Ultralight pieces push this further: the Mountain Hardwear Ghost Whisperer, for example, uses a 10D nylon shell to hit an 8-ounce weight, while models like the Rab Mythic G go as light as 7D. These thinner shells pack down small and keep ounces low, but they compromise long-term durability.
Fleece Fabric
Fleece fabric is a different story altogether. Its weight is measured in grams per square meter (g/m²), with most fleeces falling into three categories: lightweight (100 to 200 g/m²), midweight (200 to 300 g/m²), and heavyweight (300 g/m² and above). Grams per square meter is a useful starting point for gauging breathability—the lighter the fleece, the airier it tends to be—but design and construction also play major roles, both in breathability and durability.
Compared to nylon or polyester shell fabrics, fleece comes in a far wider range of variations. From smooth-faced grids to shaggy high-loft piles, each style serves a different purpose and performs differently in the field. For example, Norrøna's Trollveggen Warm3 fleece uses an irresistibly warm and cozy sherpa fleece (300-400 g/m²), while the Senchi Designs A90 has a breathability-focused grid fleece that weighs only 90 g/m².
Many of the midlayers in this guide come without a hood, and for good reason: hoodless jackets and fleeces layer more cleanly under a shell and stay comfortable over long ski days. If you’ve ever doubled up on hooded layers, you know how busy it can get back there with one hood stacking into the next. Choosing a hood often comes down to how frequently you plan to wear your midlayer as an outer layer (see our FAQs for more on this).
Opting for a hooded version—usually $10 to $30 more—does bring advantages. You gain extra head coverage and warmth without digging into your pack for a beanie, and some hoods are designed with helmets in mind. Slim, scuba-style options like the Patagonia R1 Air Hoody or the Rab Cirrus Flex Insulated Hoody slide neatly under a ski or climbing helmet. Others, such as the Arc’teryx Atom Hoody, are cut to fit snugly over a climbing helmet or low-profile ski helmet, but not a full-sized ski lid.
Helpful features to look for include stiffened brims to shed light precip and adjustment tabs at the sides or back for dialing in the fit when you’re not wearing a helmet. No matter which style you choose, make sure the hood fits comfortably on your head, both with and without a hat or helmet.
Storage layouts vary widely among midlayers. Most down and synthetic jackets come with at least two zippered hand pockets and often add extras like a chest pocket or even an internal dump pocket for stashing gloves or skins. We especially like models that stuff into their own pocket for easy storage—standouts include the Mountain Hardwear Ghost Whisperer and Patagonia Nano Puff.
Fleeces tend to be more minimalist. The Senchi Designs A90 is the purest example, offering nothing beyond its hood and half-zip, while the Outdoor Research Vigor Grid adds only a single chest pocket. Others, like the Norrøna Trollveggen Warm3 and Patagonia R1 Air, provide a small zippered chest pocket alongside hand pockets—useful for stashing a phone or wallet.
Most down and synthetic jackets are available exclusively in full-zip designs, but fleeces are offered in multiple styles. Full-zip models like the Patagonia R1 Air are the easiest to put on and take off and provide the most ventilation, though they’re also heavier, bulkier, and often more expensive. Half- and quarter-zip fleeces strike a balance between weight and adjustability, while pullovers are the lightest and most packable but offer no venting and can be a hassle to remove—especially if you’re wearing a helmet or hat.
Ultimately, zipper layout comes down to personal preference and how you plan to use the fleece. Consider your layering system and activity style when choosing, and be aware that some versions are only available in men’s or women’s sizing—a frustrating but fairly common limitation.
Not every midlayer comes with a hem cinch, but they’re especially common on down and synthetic jackets. This elastic cord runs around the bottom hem to seal out wind and snow while trapping warmth inside.
Adjustment is done with toggles, and the best versions are easy to operate even with thick ski gloves. A well-executed hem cinch can make a midlayer feel noticeably cozier, so it’s a small feature we always appreciate.
Thumb loops are a welcome feature on many of our favorite fleeces and an unexpected bonus when they show up on puffies. These fabric extensions at the cuffs have a thumb hole, anchoring the sleeve at your wrist and providing light coverage for your hands while keeping your fingers free. They’re especially useful on chilly days when gloves feel like overkill. And when designed well, thumb loops disappear into the sleeve when not in use, staying out of the way until you need them.
Your Questions Answered
As you may have noticed, many of the midlayers in this guide come without a hood—though nearly all are offered in hooded versions for a bit more money. We find hoodless jackets easier to slot into the classic three-layer resort setup (base layer, midlayer, shell), particularly with down and synthetic pieces where a bulky hood can get in the way. If most of your skiing is at the resort and you don’t mind going without a hood for around-town wear, a hoodless jacket is likely the most comfortable choice.
The equation shifts if you spend a lot of time in the backcountry, whether on skis in winter or on foot in summer. In those settings, you’re more likely to wear a midlayer as an outer layer when conditions allow, and having a hood adds useful versatility and head protection—whether that’s for a cold alpine start or a long belay. Many of the jackets and fleeces in this guide come in both versions, and we cover the fit and performance of their hoods in detail in our long-form product reviews.
If you’re dead set on choosing One Midlayer to Rule Them All, we recommend a lightweight synthetic jacket with around 60-gram fill. Synthetic insulation is generally more breathable than down, significantly cheaper, and far more reliable in wet conditions since it retains loft when damp. While not as warm as a comparable down puffy, it can actually be easier to slot into a ski layering system unless you’re facing extreme cold.
Compared to fleece, synthetics offer greater insulation and perform better across a wider range of conditions. Fleece still wins for breathability on warm days or during big ascents, but a synthetic midlayer is the more versatile one-quiver option. Some models even blend the two—hybrid designs like the Arc’teryx Atom add panels of fleece for breathability and mobility, while fully insulated pieces like the Patagonia Nano Puff are proven all-rounders and favorites among the Better Trail team.
If you’re frequently strapping on your planks in temperatures in the teens or lower, a down puffy with plenty of high-fill-power insulation is the way to go. Breathability won’t be much of a concern—you’ll want to trap every bit of warmth you can—and down generally feels cozier and more comfortable than synthetic fill.
That said, not all down jackets are suited for frigid conditions. The Mountain Hardwear Ghost Whisperer, despite its 800-fill insulation, is too light for truly cold environments. The Patagonia Down Sweater, on the other hand, hits a sweet spot: it packs in 5 ounces of 800-fill down, offers excellent warmth for its weight, and still layers comfortably under a shell. While a heavyweight belay parka like the Rab Neutrino Pro might sound tempting, it’s overkill for most ski layering systems. As a bonus, the Down Sweater doubles nicely as part of a casual winter wardrobe.
Because backcountry skiing is such a high-exertion sport, the ideal midlayer is one you can leave on without overheating. Breathability is key, which makes synthetic puffies and fleeces the best options. You’ll also want something with enough stretch for unrestricted movement and the ability to pack down small when it’s time to shed layers. Heat output varies from person to person, and conditions can swing dramatically, so there’s no single perfect midlayer—but several models in this guide that we endorse for the skin track.
The Arc’teryx Atom is a strong all-rounder, pairing 60-gram synthetic insulation with fleece side panels for a balance of warmth and airflow. The Patagonia Nano-Air Light Hybrid takes breathability a step further, using thinner 40-gram insulation paired with R1 Air fleece across the back, sides, and underarms to vent heat during steep climbs. Pure fleece options like the Senchi Designs A90 or Outdoor Research Vigor Grid offer the most breathability of all, though they’re less versatile than synthetics and can leave you chilly if temps really drop.
For skiers who tend to overheat, the best options are lightweight, breathable synthetic jackets or airy fleeces, like those outlined above. These pieces strike a balance between insulation and airflow, keeping you comfortable without constantly stopping to shed layers.
Another option worth considering is the down-filled Mountain Hardwear Ghost Whisperer. At only 8 ounces, it’s one of the lightest midlayers in this guide. While it uses premium 800-fill down, it runs significantly cooler than heavier down jackets like the Patagonia Down Sweater or REI Co-op 650. It also packs down to a crazy-small size, meaning it can disappear into a corner of your backpack when the insulation becomes too much.
Merino wool makes for an appealing midlayer fabric thanks to its natural temperature regulation: it wicks moisture, breathes well, and continues to insulate even when wet. It also resists odor far better than synthetics, which is a big perk for multi-day use. That said, merino is far more expensive to produce, so while it’s common in base layers like the Ridge Merino Aspect, it’s relatively rare in technical fleeces or puffies.
Still, merino midlayers do exist. Ortovox is one of the most recognizable brands in this space, with pieces like the Fleece Grid Jacket and Swisswool Piz Boe Jacket incorporating merino into their construction. Smartwool also offers a few models, including the Smartloft Hybrid Insulated Jacket. Just be prepared to pay a premium for the material—these jackets don’t come cheap.
Not many skiers wear insulated pants, but those who do tend to really appreciate them when the temperatures drop. Midlayer bottoms are almost always down or synthetic puffies, since heavyweight base layers generally cover the role of fleece. The same rules apply as with tops: synthetic pants are more breathable, more water-resistant, and typically less expensive, while down pants are warmer for their weight, pack smaller, and feel cozier, but are more fragile.
Some options directly mirror popular jackets. The Mountain Hardwear Ghost Whisperer Pant ($295) is as light and warm as its down jacket counterpart, though just as delicate, and Patagonia’s Nano-Air Light Bottoms ($229) feature the same 40-gram synthetic insulation as the Nano-Air Light Hybrid.
It’s worth noting that most insulated pants are designed more for camp, hut use, or hiking than for skiing—full-length puffies rarely pair well with ski boots. That said, several brands make three-quarter-length options that end above the boot for better comfort, including the Backcountry Wolverine Cirque, Helly Hansen Lifaloft Full Zip Insulator, and Norrøna Lyngen Down 850 Knickers.
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