Updated:
Jan 20, 2025Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
Type
Air
R-value
4.9
Weight
1 lb. 5 oz.
Packed Size
10 x 5 in.
Thickness
3 in.
Fabric(s)
30D polyester
Pros
Cons
REI Co-op Helix Insulated
For this season's top models, see our guide to the Best Backpacking Sleeping Pads.
The REI Helix Insulated’s comfort level is all over the place, and not in a good way. I’ll start with the positives: Its ripstop polyester face fabric is soft and substantial, which is a breath of fresh air compared to more slippery, fragile-feeling nylon sleeping pads (like the Therm-a-Rest NeoAir XLite NXT). I’m also a fan of the Helix’s air-cell baffle design, which seems to hug my body and hold it in place—a nice change of pace from my Therm-a-Rest’s horizontal baffle design that attempts to slide me off the pad each night. As a result of the soft and tacky material and centering baffles, sleeping on the Helix feels relatively stable. It’s quiet, too, so you’ll be less likely to wake your partner (or yourself) while settling in.
The praises stop there. Although the REI Co-op Helix Insulated is 3 inches thick, it doesn’t perform like a cushy pad. Between the air cells are dead spots of flat, uninflated fabric, which make the pad feel flimsy and far less air-filled than its stated thickness would suggest. These spots of zero cushion are especially obvious when sleeping on my side—I can feel the ground closely through the pad. Because of this design, the Helix lacks structure (it does not lie flat in my tent) and does not have the stable, cushy feel of other air-cell designs like the Nemo Tensor All-Season.
With its 4.9 R-value and two layers of internal reflective insulation, the Helix Insulated is nominally a three-season-plus pad. (Its R-value lies in the upper reaches of three-season models, but true winter-worthy pads have an R-value of 5.0 or higher.) However, the Helix’s performance didn’t match its specs. I tested it while sleeping on snow in around-freezing temperatures in Washington’s Central Cascades; when paired with REI’s Magma 30 sleeping bag, it didn’t keep me warm. The Helix would work well for summer camping and suffice in the shoulder seasons (as long as you’re sleeping on grass or dirt rather than rock or snow), but I wouldn’t try my luck in freezing temperatures again.
Taking its middling warmth and weight together, the Helix lags behind the competition. It weighs 1 pound 5 ounces in its regular mummy shape, which is significantly heavier than a popular backpacking sleeping pad like the 13-ounce Therm-a-Rest NeoAir XLite. Considering that the XLite has an R-value of 4.5 (it was warmer than the Helix in our testing despite the lower spec), the Helix has a pretty disappointing warmth-to-weight ratio. Even a heavier sleeping pad like the Nemo Tensor All-Season offers much more efficient warmth (1 lb. 1 oz.; 5.4 R-value)—and it’s warm enough to reliably use during shoulder season or mild winter days. It’s worth noting that the Helix ($169) is cheaper than both the NeoAir XLite ($210) and the Tensor All-Season ($200); but even on a strict budget, I’d hesitate to choose it over the other pads.
The Helix packs down to 9.5 by 5 inches in its regular mummy size. Both the Therm-a-Rest NeoAir XLite and the Tensor All-Season are noticeably more compact (9 in. by 4.1 in. and 10 in. by 4 in., respectively). In the end, this bulky pad just isn’t for hikers who have streamlined packs and ultralight ambitions. It is, however, a satisfactory pad for more casual endeavors.
One redeeming quality of the Helix is that the included stuff sack is fairly roomy. It was nice not having to nail the roll-up every time I wanted to fit the pad inside. REI also includes a velcro strap for those who prefer to forgo the sack.
Made from 30-denier ripstop polyester with TPU lamination, the Helix offers average durability among air pads. Its direct competitors’ materials vary slightly in one direction or the other, strength-wise: The Sea to Summit Ether Light XT, for example, has a 30D top and 40D base fabric (and also weighs less), while the Tensor All-Season is 20D nylon on top and 40D on the bottom. The NeoAir XLite also checks in with a 30D nylon top and base, so the Helix keeps pace with the backpacking sleeping pad category at large.
My Helix Insulated developed a hole during the second night of using it. I slept on the pad inside a tent but with no foam pad underneath. I couldn’t locate the hole and spent hours studying the valve, which I suspect could have been leaking. If I had found the hole, REI conveniently included a repair kit for quick fixes. And I can’t end this discussion without adding the significant caveat that I’ve inadvertently punctured every pad I've ever used—the jury is still out whether this is a curse, faulty pads, or simply being hard on my gear.
The REI Co-op Helix Insulated is relatively easy to blow up. It comes with a pump sack, which you attach to the inflation valve and then squeeze to force air into the pad. It took about five bag’s worth of air to inflate the pad. I appreciate that the Helix has dedicated values for inflation and deflation, which makes the process of inflating and deflating relatively foolproof. Nemo’s sleeping pads, by contrast, stack the valves inside each other, making it possible to accidentally detach the deflation valve when removing the pump sack from the inflation valve. Still, two valves add up to more weight and increase the potential for leaks.
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.
Repair Kit
Repair kits help extend a product’s lifespan by allowing users to quickly fix issues—like sleeping pad punctures or damaged inflation valve seals—rather than replace the item entirely. A green check indicates the product includes a repair kit, while a red X means it does not.
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.
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.
I tested the regular-sized Helix Insulated, which measures 72 by 20 inches. This is my standard pad size and is a great fit for my 5-foot-5-inch-tall frame. If you study the Helix compared to the Therm-a-Rest NeoAir XLite or Nemo Tensor All-Season, you’ll notice that it's boxier at the head and maintains its 20-inch width for longer before tapering at the feet. In practice, I don’t notice any difference in size. REI also offers the Helix Insulated in a wide version (72 by 24 in.) and a long version (78 by 24 in.). It’s only available in mummy shapes, which might be a drawback for campers who prefer rectangular sleep systems.
Therm-a-Rest NeoAir XLite NXT ($210): Lighten Your Load—and Your Wallet
In terms of pure comfort-to-weight ratio, the NeoAir XLite NXT is one of our favorite pads to take into the backcountry. Like the Helix, the NeoAir XLite is 3 inches thick, but in practice, it feels a lot more plush: The horizontal baffles don’t have any thin spots between them, which results in a lot more structure and air underneath your body. Despite its lower R-value (4.5), we’ve also experienced it as a warmer pad—it’s kept us comfortable while sleeping on snow and in freezing temperatures, while the Helix has fallen short. Finally, the NeoAir XLite puts it all together for just 13 ounces, which is the pad’s most notable highlight. You’ll pay a pretty penny, but for weight-conscious backpackers, it’s la crème de la crème. For more, read our NeoAir XLite review.
Big Agnes Divide Insulated ($130): Spend Less, Get More
The Big Agnes Divide Insulated is a pad that doesn’t perform “down” to its price point. With 3.25 inches of thickness, 3.5-inch side rails, and no dead space between baffles, our tester described the pad as “plush and comfy,” a world away from our experience with the disappointingly uncomfortable Helix. And despite the Divide’s R-value of 4.0 being less than the Helix’s 4.9, that’s still plenty of warmth for fair-weather backpackers (and we have no reason to doubt this pad’s thermal efficiency as we do with the Helix). All that, and it weighs just 1 ounce more and is a full $49 cheaper. We’ll take the Divide Insulated over the Helix every time, and recommend you do the same. For more, read our review of the Divide Insulated.
While the Helix Insulated’s price-to-warmth ratio looks impressive on the surface, we suggest you spend your money elsewhere. This pad has an odd baffle design and questionable warmth.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
A thru-hiker’s dream, this top-shelf pad boasts fantastic warmth for just 13 ounces. The NeoAir XLite NXT is versatile, easy to inflate, and less noisy than its predecessor. Comfort is the only area where it doesn’t excel.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
One of the best budget models we tested, the Divide Insulated has an impressive R-value and comfort level for its price. Its weight and warmth don’t exactly turn heads, but your wallet will notice.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
Even though the Helix ranks in the bottom tier of sleeping pads we’ve tested, it’s not a complete loss. Its price is good for a model that’s light and compact enough for backpacking, and its face fabric has a nice feel. That’s about it, though; as you’ve probably gathered by now, we think that there are plenty of pads on the market that put it all together much better than the Helix. Heck, if savings are foremost on your mind the Big Agnes Rapid SL (R-value 4.8, 1 lb. 1 oz.) or Divide Insulated (R-value 4.0, 1 lb. 6 oz.) are both just as warm and less expensive, at $150 and $120 respectively. In the end, we’d only sleep on the REI Co-op Helix Insulated if our options were extremely limited.
it's trail o'clock
Gear Guide
Best Backpacking Sleeping Bags of 2026Gear Guide
Best Backpacking Tents of 2026Gear Guide
Best Backpacking Backpacks of 2026Gear Guide
Best Trekking Poles of 2026curated for you