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REI Co-op Flash Hyperstretch Fleece Jacket Review

Jude Glenn bio photo
ByJude Glenn
Jul 03, 2025
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Our Take:
4.1/5
Certified
The REI Flash Hyperstretch ($100) is a breathable, stretchy fleece that excels during high-output activities in cool conditions. Its soft, sweater-like feel and light build make it a great choice for those who move fast and want to save cash. However, it’s less warm than most fleeces and feels a bit flimsy, with some quality concerns in the stitching and fabric. If you want a cozy or rugged midlayer, look elsewhere. But for mild-weather missions where breathability matters most, the Flash Hyperstretch is a fun, affordable option—as long as you’re okay with the tradeoffs.
Warmth

Warmth

2.5/5
Comfort & Mobility

Comfort & Mobility

4/5
Breathability

Breathability

4/5
Durability

Durability

2.5/5
Weight & Packability

Weight & Packability

4/5
Sustainability

Sustainability

4/5

Category

Technical

Weight

13 oz.

Fabric(s)

54% polyester, 35% nylon, 11% elastane

Styles

Full-zip hoody

Pros

Soft fabric that feels more like an athletic hoody than a traditional fleece.
Packs down small for easy on-the-go storage.
Undercuts most technical fleeces in price.

Cons

Not a durability leader: seams showed signs of fraying after limited use, and thin fabric requires extra care.
Even for an active fleece, it’s not particularly warm.

For this season's top models, see our guide to the Best Fleece Jackets.

The REI Co-op Flash Hyperstretch is built for movement, not max insulation. As part of REI’s backcountry-oriented Flash line, its focus is on breathability and stretch rather than warmth. Despite its medium thickness, it doesn’t trap heat particularly well, and during testing, I consistently found it better suited for mild to cool conditions or as a layering piece. On a February backpacking trip in Haleakalā, with summit temps in the 40s to 50s Fahrenheit, it was comfortable while hiking, but I needed a shell once the sun dipped. Likewise, during a snowshoeing trip near Bend in 30°F weather, it performed great on the move as a midlayer but wasn’t enough when stationary without additional insulation.


Compared to my other active fleece jackets, the Outdoor Research Vigor Quarter Zip and Vigor Hoodie, the REI Co-op Flash Hyperstretch sacrifices insulation for mobility and ventilation. It’s thinner and less insulating than both of those, but it offers improved breathability and a more athletic feel. For active use in moderate conditions, it hits a nice balance. But if you’re looking for a performance fleece that holds in more warmth—especially when you're standing still—Patagonia’s R1 Air Full-Zip is the better pick.

The Flash Hyperstretch blends athletic stretch and softness in a package that feels more like a performance hoodie than a traditional fleece. With 11% elastane in the fabric, mobility is excellent—it moves fluidly with the body and layers easily under a shell (provided the boxy cut doesn’t create too many issues with bunching). The smooth, hardface exterior slides effortlessly beneath outer layers, and the plush interior is soft against the skin. Even when zipped to the top, the collar remains comfortable, with no scratchiness or pressure against the chin. The overall feel is light, low-bulk, and breathable, making it easy to wear during a range of activities without restriction or overheating.


That said, among fleece jackets—which tends to excel in comfort—the Flash Hyperstretch sits just a notch below the top contenders. Compared to the premium Arc’teryx Kyanite, which uses Polartec fabric for superior plushness and mobility, the Flash feels slightly thinner and less luxurious. It also can’t quite match the ultra-soft coziness of Patagonia’s R1 Air. Still, for $100, it offers an excellent balance of next-to-skin comfort, stretch, and streamlined layering performance—especially for those who prioritize mobility over maximum softness.

Breathability is the Flash Hyperstretch’s standout trait, making it a quality choice for high-output activities like hiking, snowshoeing, and even light ski touring in moderate to cold temperatures. In testing, it performed impressively across climates—from snowshoeing near Bend to hiking in the humidity of Maui—never feeling swampy or overly warm. On a sunrise climb of Haleakalā, it vented heat effectively and stayed comfortable even during sustained uphill movement. As an outer layer, the fabric allows airflow in both directions, which helps shed excess body heat without clinging to the skin.


Compared to other fleeces in this category, the Flash Hyperstretch breathes more like a thick base layer than a traditional midlayer. It’s a superior ventilator compared with casual pieces like the Patagonia Lightweight Synchilla or Fjallraven’s Keb and nearly on par with top performers like Patagonia’s R1 Air and Outdoor Research’s Vigor Grid in ventilation (the hardface outer fabric holds it back ever so slightly here). If you prioritize heat release and comfort during movement over outright warmth, the Flash Hyperstretch delivers strong performance at a reasonable cost.

Durability is where our confidence in the REI Co-op Flash Hyperstretch begins to waver. While REI’s in-house gear can offer great value, this fleece leans a little too far toward the budget end. The fabric feels thin and more akin to athleisure wear than a technical midlayer built for mountain use. Stitching along the hood and cuffs isn’t reinforced and appears delicate, and there are early signs of fraying after just a few outings. The overall construction doesn’t inspire the long-term confidence we expect from backcountry-focused layers.


To its credit, the nylon face fabric isn’t prone to pilling, the zippers operate smoothly, and the jacket held up decently across roughly two weeks of hiking, snow layering, and casual wear in Maui and Bend. That said, the thin material and borderline flimsy build make it best suited for light use rather than heavy-duty adventuring. Fleece jackets aren’t generally known for being bombproof, but even by category standards, the Flash Hyperstretch feels less robust than premium alternatives from brands like Patagonia or Arc’teryx.

At 13 ounces for the men’s version, the Flash Hyperstretch hits squarely in the middle of the lightweight technical fleece jacket category. It’s nearly identical in weight to the Outdoor Research Vigor Grid (12.9 oz.) and Patagonia R1 Air (12.9 oz.), though notably heavier than The North Face’s ultralight Futurefleece (7.3 oz.). It doesn’t include a stuff sack or dedicated stow pocket, but it rolls easily into its own hood or compresses down to the size of a large grapefruit or 1-liter bottle. In real-world testing—whether on Haleakalā’s alpine slopes or snowshoeing in Oregon—it proved easy to pack and carry, offering reliable layering warmth without taking up a lot of precious space in a daypack or overnight load.

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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.

The REI Co-op Flash Hyperstretch offers a fairly standard feature set for a lightweight, active fleece. The close-fitting hood is unstructured and feels more shallow than roomy—it fits comfortably over a beanie or ballcap but is too snug to accommodate a climbing or ski helmet. While there are no adjustment points, the elasticized construction helps the hood stay put during movement, with a good field of vision and solid performance in light wind.


Storage is basic but functional: two zippered hand pockets provide enough room for a phone, gloves, or snacks, and are placed at a convenient, non-intrusive height. However, unlike some competitors, the jacket lacks a chest pocket or thumb loops—features you do get on the Outdoor Research Vigor Grid, The North Face Futurefleece, and Patagonia’s R1 Air. Overall, the Flash Hyperstretch gets the job done, but doesn’t push the needle in the features department.

The REI Co-op Flash Hyperstretch is available in men’s sizes S to XXXL and women’s XS to XXXL. I opted for my usual men’s large, and while the fit initially felt a bit snug, the stretchy fabric quickly proved comfortable and easy to move in. It hugs the body more than expected—a little surprising given that REI products often run roomy and boxy—but never felt restrictive, even during high-reach movements, where the generous stretch really shines. The back and arm length offered full coverage without riding up, and while the silhouette might not be ideal for technical layering under a trim shell, it’s a solid match for everyday wear or moderate outdoor activity. Finally, there’s a cinch at the bottom hem for dialing in the fit if you find it too loose.

Outdoor Research Vigor Grid ($120): A Durability Boost
In contrast to the Flash Hyperstretch’s less-than-confidence-inspiring construction, the Vigor Grid Fleece Full Zip has held up wonderfully over time. One tester reported that she’d used it for two years with nary a loose thread, and so this model outpaces the Flash Hyperstretch despite having zero nylon in its fabric blend. Performance-wise, the Vigor Grid also prioritizes breathability and has a similar use case if your goal is to make miles in moderate to chilly conditions. (It’s slightly less warm than the Hyperstretch, though.) With thumb loops and a chest pocket—in addition to two hand pockets—the Vigor Grid is more full-featured, and it comes in more zipper configurations. If you’re sticking with the hooded full-zip version, we think the extra $20 compared to the Flash Hyperstretch is worth the spend. To learn more, see our Outdoor Research Vigor Grid review.

Mountain Hardwear Summit Grid Hoody ($95): More Affordable, Less Technical
If the Flash Hyperstretch’s price is its most appealing attribute to you, the Summit Grid Hoody is even cheaper (if not by much). It’s also a less technical piece, with a flowy cut that won’t work as well on an extended backpacking trip but is more comfortable if you’re hanging in town. The Summit Grid is also warmer, with midweight fleece fabric that’s best for slow-paced activities under approximately 50°F; as such, the Flash Hyperstretch is the better choice if you’re going fast. However, the Summit Grid’s uber-cozy fabric is among the most comfy materials we tested and will stand up to the test of time better than the former fleece’s thin construction. If you’re focused on saving money but less so on making miles, go with the Summit Grid. For savings-conscious speedsters, choose the Flash Hyperstretch. For more, read our review of the Summit Grid Hoody.

REI Co-op Flash Hyperstretch ($100)
Man wearing REI Co-op Flash Hyperstretch fleece jacket looking out at landscape
4.1/5

This light, flexible fleece works well as a breathable layer for high-output activities. The Flash Hypsterstretch is also reliably comfy and costs significantly less than other active fleeces, although it’s held back by middling durability and below-average warmth.

Category
Technical
Weight
13 oz.
Fabric(s)
54% polyester, 35% nylon, 11% elastane
Styles
Full-zip hoody
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Warmth

2.5/5
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Comfort & Mobility

4/5
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Breathability

4/5
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Durability

2.5/5
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Weight & Packability

4/5
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Sustainability

4/5
The North Face Futurefleece Full-Zip Hoodie ($190)
Close-up of woman zipping up The North Face Summit Series Futurefleece Full-Zip Hoodie fleece jacket
4.5/5

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.

Category
Technical
Weight
7.3 oz.
Fabric(s)
100% polyester
Styles
Full-zip hoody, half-zip
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Warmth

2/5
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Comfort & Mobility

4.5/5
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Breathability

5/5
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Durability

3/5
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Weight & Packability

5/5
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Sustainability

3.1/5
Mountain Hardwear Summit Grid Hoody ($95)
Woman wearing Mountain Hardwear Summit Grid Hoody fleece jacket in mountain meadow
4.2/5

This simple fleece won us over with its ultra-soft feel and trendy (well, at least for mountain towns) aesthetic. The Summit Grid Hoody is a casual piece that you’ll appreciate much more on easygoing hikes than technical missions, though.

Category
Casual
Weight
11.5 oz.
Fabric(s)
100% polyester
Styles
Half-zip, pullover
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Warmth

3/5
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Comfort & Mobility

4/5
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Breathability

3/5
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Durability

3.5/5
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Weight & Packability

4/5
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Sustainability

1.7/5

Is the Flash Hyperstretch for You?

The REI Co-op Flash Hyperstretch is a great fit for active users who prioritize breathability and mobility over maximum insulation. It excels as a midlayer for high-output activities like hiking, snowshoeing, or mild-weather backpacking. If you want something soft, stretchy, and lightweight that moves well and disappears into your pack, the Flash delivers at a reasonable $100 price. But if warmth, ruggedness, or premium feel are high on your list, you’ll likely be better served by a higher-end and more well-rounded technical fleece jacket like the Patagonia R1 Air or Arc’teryx Kyanite.

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