REI Co-op Screeline Alpha Hoodie Review: Alpha Direct Goes Mainstream
Polartec Alpha Direct has become the golden child of breathable insulation, but until recently, backpackers had to turn to small cottage brands to find it. The REI Co-op Screeline Alpha Hoodie ($100) brings 90-gram Alpha Direct to a wider audience in a simple pullover that lets the fabric do the talking. We were blown away by its temperature regulation and warmth-to-weight during a fall trip into the Enchantments, and it’s quickly become our favorite midlayer for high-output activity. Alpha Direct’s trade-offs are real, but if you know what you’re getting into, the Screeline Alpha is a standout at a lower price than most alternatives.
Warmth
Comfort & Mobility
Breathability
Durability
Weight & Packability
Sustainability
Category
Technical
Weight
4.3 oz.
Fabric(s)
Polyester (Polartec Alpha Direct 90)
Styles
Pullover hoody
Pros
Cons
REI Co-op Screeline Alpha
For this season's top models, see our guide to the Best Fleece Jackets.
The REI Co-op Screeline Alpha isn’t particularly warm at face value—at 90 grams per square meter (gsm), it’s firmly in the lightweight category—but what it offers is incredible warmth for its weight. It also really comes alive once you start generating your own heat, trapping warm air in much the same way as down. The key to the Screeline Alpha’s magic is right in its name. Polartec Alpha Direct is a much-lauded modern invention—an open-knit fabric that attaches lofty polyester fibers directly to a stable mesh. Think of it as the more refined version of down fibers glued to an airy base layer. The result is a material that dumps extra heat and sweat quickly when you’re working hard and traps dead air when you slow down. The temperature range of Polartec Alpha Direct is nothing short of amazing.
I experienced this firsthand on a fall backpacking trip in Washington’s Enchantments. Following the old “be bold, start cold” rule, I shed my down jacket as I put on my backpack, wearing just the Screeline Alpha over a synthetic T-shirt in the morning’s mid-40s temperatures. I was on the edge, but comfortable—and the Screeline’s hood was a nice addition for my cold ears. As the day and our bodies warmed, my hiking partners stopped to shed layers while I marveled at the Screeline’s breathability and warmth. It’s noticeably airy—it does nothing to stop a breeze, and thus doesn’t threaten to clam up—yet warms enough with body heat to provide comfort while at rest.
Overall, I’d give the REI Co-op Screeline Alpha Hoodie a working temperature range of about 35 to 60 degrees (worn alone or over a T-shirt), as long as you’re staying active at the low end and aren’t going all-out at the high end. It’s the kind of fabric that multiplies what you give it—if you’re at rest and not generating much body heat, it’ll feel just a bit warmer than a 90-gram fleece (tack on some wind, and it will feel like you’re wearing nothing). But as soon as you warm the material’s fibers, it starts to trap heat; and the more airflow you generate (by moving), the more it cycles that heat around. In other words, it’s at its best on the move.
The Screeline Alpha is a remarkably comfortable performance fleece, though its airy build means it isn’t quite the cozy cocoon some people want from a fleece. Its Polartec Alpha Direct fabric is about as soft as fleece gets, with no hint of the plasticky, scratchy feel of older polyester fleeces. I loved wearing it all day on the trail, with the soft hood bunched around my neck, and it was the perfect next-to-skin layer at night as I cozied up in my sleeping bag. Its excellent breathability adds to the comfort, since this fleece never gets clammy.
My only complaint is that the Screeline Alpha lacks the secure, wrapped-up feel of a denser fleece. The open-knit material is so airy that it can feel a bit insubstantial, especially when you’re sitting still. But that airiness also gives the fleece great mobility. I felt like I was wearing next to nothing in the Screeline Alpha, and despite its lack of stretch, I could reach, bend, and twist with absolutely zero restriction. For active days, that freedom of movement easily makes up for the missing coziness.
The REI Co-op Screeline Alpha earns a perfect score for breathability, no ifs, ands, or buts about it. Breathability and a fast dry time are the magic of Polartec Alpha Direct and the main reason to consider any layer made with it. The fabric is built from lofty polyester fibers attached to an open mesh backer, so air moves straight through. That same openness is the trade-off: In windy conditions, the Screeline gives you very little warmth unless you add a shell.
I saw how well the Screeline Alpha breathes while hiking up Asgard Pass, the 2,200-foot climb from Colchuck Lake into the Core Enchantment Zone near my home in Leavenworth, Washington. While my hiking partners (aka my Better Trail colleagues) stopped to shed layers, I started and finished the climb in the Screeline Alpha over a polyester T-shirt. That’s right: from morning cold to midday sun, and from resting to 160 beats per minute, the Screeline Alpha kept me comfortable the whole time. The light breeze from moving uphill kept air flowing through the fabric, and I never felt even a hint of clamminess on the way up.
The Screeline Alpha’s Polartec Alpha Direct lacks any sort of liner or face fabric, so it’s essentially exposed insulation. That’s key to its temperature regulation, but also comes at the cost of durability. The wear isn’t immediate: After about a week’s worth of days in mine, it still looks as good as new. Even so, I expect its thin, delicate build to show its age faster than most of the fleece jackets we’ve tested. The exposed fibers can catch easily on Velcro, granite, or branches, and can pill or thin out where heavy pack straps rub against them over and over.
A little care goes a long way toward extending the Screeline Alpha’s life. The best way to protect it is to wear it mainly under a wind or rain shell. I love wearing it on its own because that’s when its breathability really shines, but it’s also an excellent midlayer for cold-weather activity. I also recommend washing and drying it on low heat, since polyester can melt or shrink at high temperatures. To cut down on microplastic shedding, pick up a mesh laundry bag like a Guppyfriend.
The Screeline Alpha’s featherlight, packable build is one of its biggest highlights, along with its breathability and temperature regulation. The women’s version I tested weighs only 4.3 ounces and can be balled up to about the size of a softball, which is remarkable for how much warmth it gives. Because it packs down so small, I don’t hesitate to bring it anywhere: stuffed into my running vest, strapped to my bike’s handlebars, or tucked into a side pocket of my backpacking pack. Aside from down, few materials give you this much warmth in such a small package.
A quick comparison shows how light it really is. The North Face Futurefleece is also built for breathability, but its smooth face adds bulk, and the women’s version weighs 6.2 ounces. Norrona’s Falketind Warm1 Active uses a similar material in a full-zip design and weighs 7.1 ounces. And then there are much heavier traditional fleeces, including the Patagonia R1 Air at 11 ounces and the Arc’teryx Kyanite Hoody at 12.9 ounces.
Select icon to view details:
Longevity
Choosing durable outdoor gear and keeping it in use for longer is one of the best ways to reduce environmental impact. Our proprietary longevity rating assesses factors like overall build quality, materials, fabric denier, component durability, and real-world performance. A green check indicates that we expect the product to be long-lasting relative to its peers, a yellow check mark indicates average longevity, and a red X indicates a product that may have a limited lifespan.
Recycled Materials
Recycled materials are prevalent in outdoor gear, with nylon, polyester, wool, and down among the most common, but the composition varies widely. A green check mark indicates the product is made with a substantial amount of recycled materials (100% recycled or the core fabric that makes up most of the product is recycled), a yellow check means it contains a moderate to small amount of recycled materials, while a red X means there are no recycled materials in the product.
Bluesign Approved
Bluesign Technologies, based in Switzerland, operates a third-party textile management system that ensures materials are manufactured to strict environmental, chemical, and worker safety standards. A green check mark indicates a product is either a Bluesign Product (contains at least 90% Bluesign-approved fabrics and 20-30% Bluesign-approved accessories) or features a significant amount of Bluesign-approved materials. A yellow check mark means it uses some Bluesign-approved materials but less than the aforementioned category, and a red X means there are no Bluesign-approved materials in the product.
Responsible Manufacturing
This criterion evaluates a brand’s commitment to fair wages, safe working conditions, and reducing environmental impact through certifications and programs like Fair Trade Certified, Fair Wear Foundation, Worldwide Responsible Accredited Production (WRAP), and the Fair Labor Association, while also recognizing brands that manufacture primarily in the U.S. or Europe under strict labor and environmental regulations. A green check mark indicates a brand meets our responsible manufacturing criteria, while a red X means it does not.
Recycled and/or Reduced Packaging
Packaging can add significant waste to outdoor gear purchases, so many brands work to reduce its impact by using recycled materials, incorporating Forest Stewardship Council-certified paper products, and minimizing plastic and paper use. A green check mark indicates a brand uses recycled or reduced materials across all of its packaging, a yellow check indicates moderate or limited use of recycled or reduced packaging, and a red X indicates the brand does not make either of these efforts.
Repair Services
Repair services extend the lifespan of outdoor gear and reduce overall consumption, though programs vary widely. Some brands offer comprehensive repairs for a range of issues, while others provide limited or no repair support. A green check mark indicates a robust repair program, a yellow check mark indicates limited repair services, and a red X indicates the brand does not offer repair services.
Resale and/or Recycling Services
Resale and recycling programs help keep outdoor gear in circulation longer and out of landfills, ranging from trade-in resale platforms that offer store credit to take-back initiatives that recycle products at the end of their usable life. A green check mark indicates a brand offers both resale and recycling programs, a yellow check mark indicates it offers one of the two, and a red X indicates it offers neither.
Carbon Footprint Tracking
This criterion evaluates whether a brand measures, reports, and works to reduce its greenhouse gas emissions using established frameworks such as the Higg Index, Greenhouse Gas Protocol, or The Change Climate Project. A green check mark indicates a brand publicly reports greenhouse gas emissions data, sets clearly defined reduction targets, and uses established tracking frameworks such as Higg or The Change Climate Project. A yellow check mark indicates the brand tracks emissions and outlines reduction goals but provides limited data, lacks science-based verification, or does not clearly report progress. A red X indicates the brand does not appear to track greenhouse gas emissions or provides so little information that its efforts cannot be verified.
Annual Impact Report
Annual impact reports provide transparency and accountability by outlining a brand’s sustainability efforts across areas such as material sourcing, greenhouse gas emissions, waste, water use, supply chains, and packaging. A green check mark indicates a brand publishes a detailed, brand-specific impact report that closely aligns with our sustainability criteria and leaves little room for ambiguity. A yellow check indicates a brand provides some relevant sustainability reporting but lacks detail in key areas or is covered only briefly within a parent company report. A red X indicates a brand does not regularly publish an impact report.
In line with its minimal weight, the Screeline Alpha keeps its features simple, with a hood and basic thumb loops and nothing else. The hood is a bit shapeless but has an elastic brim that hugs my face, and the elastic thumb loops are less refined than those on the Norrona Falketind Warm1 Active. But both get the job done, and I love the way the hood gathers around my neck like a turtleneck when it’s not on.
I appreciate that the Screeline Alpha doesn’t have any sort of zippered ventilation, as the material is breathable enough on its own, and a zipper would just add weight and bulk. And while some might find it weird that the shirt doesn’t have a pocket, I’m glad about that too—Polartec Alpha Direct is just so thin and shapeless, it wouldn’t hold any sort of weight well. All in all, the Screeline Alpha’s simplicity will be part of the appeal for many, but if you want pockets or a tailored fit or more features, look elsewhere.
Tester: 5’6” 135 lb.
Size tested: Women’s small
The Screeline Alpha fits true to size with a trim cut that layers well, though it runs a little short and drapes oddly. I almost always wear a women’s small in tops, and the small fit me well overall. The sleeves were the right length, and I had no restriction across the shoulders. The trim but not tight cut slides easily under a shell without bunching or adding bulk, which makes it a great midlayer. I wouldn’t recommend sizing up or down, but make sure you go with a relatively roomy fit for mobility, as the fabric itself has very little stretch.
I do wish the Screeline Alpha Hoodie was a bit longer. For backpacking, I like my tops on the longer side so my back stays covered when I bend down to pitch a tent, tie my shoes, or run the stove, and the Screeline rode up more than I wanted. I was also surprised by how shapeless it is. It draped awkwardly across my body, and the hem didn’t seem to hang straight, as if the fabric had been sewn so the shirt sat at an odd angle. This seems fairly common with Alpha Direct pieces—it seems like a tough fabric to sew—but it’s worth knowing if you care about a tailored look.
Senchi Designs A90 ($115): Cottage-Brand Clout
The Senchi Designs A90 and the Screeline Alpha are close cousins: both are hooded, pocketless pullovers made of airy 90-gram Alpha Direct fabric. The key difference is that the A90 adds a half-zip for venting, impressively without adding much weight to the design. It costs $15 more, though, and Senchi releases it in small batches, so finding one in your size can be hit or miss. If you don’t mind waiting for a restock, the A90 comes with that cottage-brand clout that will make you feel a bit more core; but those who’d rather walk into REI and pay less will appreciate the Screeline Alpha. For more, read our Senchi Designs A90 review.
The North Face Futurefleece ($170): Durable Face
Like the Screeline Alpha, the Futurefleece is designed to breathe on high-output days, but TNF’s own fabric pairs a smooth face with an interior reminiscent of Alpha Direct. That face adds weight and cuts into the airiness that makes the Screeline so breathable, but it pays off in durability and wind resistance. The Futurefleece also adds a full-length zip, a small chest pocket, and a stretchy, helmet-compatible hood, all in a trim, athletic fit that looks far more tailored than the Screeline’s shapeless cut. We prefer the Futurefleece for rock climbing, where standalone warmth and durability matter more; but for backpackers, it’s hard to beat the Screeline Alpha, which is also $70 less. To learn more, check out our Futurefleece review.
At long last, REI made Polartec Alpha Direct mainstream. The Screenline is easy to find and almost always in stock (unlike many cottage-brand offerings), affordable, and lets the fabric do the talking with a simple design. The breathability and warmth-to-weight of this fabric are unparalleled.
Warmth
Comfort & Mobility
Breathability
Durability
Weight & Packability
Sustainability
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
Durability
Weight & Packability
Sustainability
The featherweight Futurefleece feels more like a souped-up base layer than a traditional fleece midlayer. It’s cozy and breathable, although it doesn’t offer much weather protection or warmth. Still, we think this exemplary active piece is worth the price for ultralight and high-effort adventures.
Warmth
Comfort & Mobility
Breathability
Durability
Weight & Packability
Sustainability
Is the Screeline Alpha for You?
The REI Co-op Screeline Alpha Hoodie is made for people who move. Backpackers, trail runners, and fast-and-light hikers will love that they can keep it on through changing temperatures and effort levels, and they’ll marvel at how much warmth packs into such a tiny package. It’s a true multi-tool whether you care about shaving grams, staying dry when you sweat, or moving freely. It shines as a standalone piece on the trail and works just as well as a midlayer under a shell, which is also the best way to protect its delicate fibers. If you want a cozy fleece for hanging around camp, a rugged layer that can handle rough use, or a tailored look, though, look elsewhere.
Go for it if you want a featherlight, highly breathable layer for high-output days in cool weather.
Pass on it if you want a durable, cozy fleece with pockets for casual wear or windy, low-output days.
hit the trail
Learn More About Hiking Gear
Gear Guide
Best Synthetic Insulated Jackets of 2026
Gear Guide
Best Down Jackets of 2026
Gear Guide
Best Hiking Daypacks of 2026
Gear Guide
Best Hiking Shoes of 2026
Gear Guide
Best Hiking Boots of 2026
Gear Guide
Best Hiking Pants of 2026
Gear Guide
Best Rain Jackets of 2026
Gear Guide
Best Trekking Poles of 2026
curated for you