Big Agnes Zoom UL Insulated vs REI Co-op Helix Insulated Air

Editorial Team
Last modified at May 23, 2026
When it comes to backpacking, a good night's sleep is crucial for an enjoyable trip. Choosing the right sleeping pad can make all the difference in your comfort and warmth. In this comparison, we look at two popular options: the Big Agnes Zoom UL Insulated and the REI Co-op Helix Insulated Air sleeping pads. Both have their strengths and weaknesses, and we'll break down each category to help you decide which one is best for your needs.

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Big Agnes Zoom UL InsulatedREI Co-op Helix Insulated Air
Zoom UL Insulated
REI Co-op Helix Insulated Air
Weight

14 oz

21 oz

R-value

4.3

4.9

Thickness

3.25 in

3 in

Dimensions

20 x 72 in

72 x 20 in

Material

Post-consumer recycled nylon ripstop

30-denier ripstop polyester with TPU lamination

Warranty

Limited Warranty

1-year REI satisfaction guarantee

Insulation Type

Two layers of heat reflective film

Synthetic

Valve System

Single port, dual-function valve

Dual inflation/deflation valves

Size

20" x 72"
25" x 72"
25" x 78"

Medium Medium Wide Long Wide

Baffling Pattern

Honeycomb

Even, gridded weld pattern

Baffle System

O-beam

Interior baffle design and weld shape

Fabric Denier

20D

30D

Packed Size

4 × 8 in

5 × 9.5 in; 5-5.5 × 10 in wide/long

Comfort

Zoom UL Insulated

4.6/ 5.0

REI Co-op Helix Insulated Air

4.3/ 5.0

Comfort is paramount when you're out on the trail, as a good night's sleep can make or break your backpacking experience. A comfortable sleeping pad should provide adequate pressure relief and support, ensuring you wake up refreshed and ready for the day's hike. The Big Agnes Zoom UL Insulated excels in comfort with its quilting baffle design and bolstered sides, providing a cushy and supportive sleep surface. Users praise its ability to relieve pressure points and cradle the body, making it feel like a cloud. The REI Co-op Helix Insulated Air also offers impressive comfort with its dimple-style baffling and vertical baffles, which provide excellent pressure relief and support. However, some users noted issues with the Helix's comfort for side sleepers and those with broad shoulders. Ultimately, the Zoom UL Insulated takes the lead in comfort due to its consistent praise for pressure relief and overall coziness.

Warmth

Zoom UL Insulated

2.3/ 5.0

REI Co-op Helix Insulated Air

4.6/ 5.0

Warmth is a critical factor for sleeping pads, especially in colder conditions. A pad with good insulation will keep you warm and cozy, preventing cold air from seeping through and disrupting your sleep. The REI Co-op Helix Insulated Air shines in this category with its R-value of 4.9 and dual reflective insulation, which effectively reduces convective heat loss and keeps users toasty warm even in subfreezing conditions. In contrast, the Big Agnes Zoom UL Insulated has an R-value of 4.3 and has received mixed reviews regarding its warmth. Many users found it insufficient for cold weather, with complaints about cold air seeping through. Therefore, the Helix Insulated Air is the clear winner for warmth, making it a better choice for three-season camping and colder temperatures.

Durability

Zoom UL Insulated

3.2/ 5.0

REI Co-op Helix Insulated Air

3.2/ 5.0

Durability is essential for a sleeping pad, as it needs to withstand the rigors of backpacking and frequent use. A durable pad will last longer and provide better value for your investment. Both the Big Agnes Zoom UL Insulated and the REI Co-op Helix Insulated Air have their strengths and weaknesses in this category. The Zoom UL Insulated features a 20-denier nylon fabric and includes a field repair kit, which users found reliable and durable over time. However, some users reported issues with mold. The Helix Insulated Air, made from a 30-denier ripstop polyester, is praised for feeling sturdy and robust, but there are concerns about valve failures and leaks. Given the mixed feedback for both, this category ends in a tie, as neither pad clearly outperforms the other in durability.

Noise

Zoom UL Insulated

2.4/ 5.0

REI Co-op Helix Insulated Air

3.6/ 5.0

Noise can be a significant factor in your sleeping experience, especially if you're a light sleeper or sharing a tent. A quiet sleeping pad ensures that you and your tent mates can sleep undisturbed. The REI Co-op Helix Insulated Air is generally quieter, with users reporting minimal crinkling and noise. In contrast, the Big Agnes Zoom UL Insulated has been criticized for being noisy and squeaky, which can be disruptive during the night. While neither pad is completely silent, the Helix Insulated Air's quieter performance makes it the winner in this category, providing a more peaceful sleep environment.

Packability

Zoom UL Insulated

4.6/ 5.0

REI Co-op Helix Insulated Air

3.3/ 5.0

Packability is crucial for backpackers who need to save space and reduce weight in their packs. A compact and lightweight sleeping pad is easier to carry and leaves more room for other essential gear. The Big Agnes Zoom UL Insulated excels in this category, with users praising its ultra-lightweight design and small packed size, which is comparable to a 1-L Nalgene bottle. It's also lighter than many other popular pads, making it an excellent choice for those prioritizing space and weight savings. The REI Co-op Helix Insulated Air, while still packable, is slightly larger and heavier, with a packed size similar to a Nalgene water bottle. Therefore, the Zoom UL Insulated is the clear winner for packability, making it ideal for backpackers looking to minimize their load.

Ease Of Use

Zoom UL Insulated

3.3/ 5.0

REI Co-op Helix Insulated Air

4.3/ 5.0

Ease of use is an important consideration, as a sleeping pad that is quick and simple to inflate and deflate can save time and effort at the end of a long day of hiking. The REI Co-op Helix Insulated Air stands out in this category with its separate, color-coded valves for inflation and deflation, making it super quick and easy to use. Users appreciate the wide opening and included inflation bag, which simplifies the process. The Big Agnes Zoom UL Insulated, while still easy to use, has a single port dual valve system that some users found a bit finicky to deflate. Therefore, the Helix Insulated Air is the winner for ease of use, providing a more straightforward and hassle-free experience.

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Conclusion & Final Verdict:

After comparing the Big Agnes Zoom UL Insulated and the REI Co-op Helix Insulated Air, it's clear that each pad has its strengths and weaknesses. The Zoom UL Insulated excels in comfort and packability, making it an excellent choice for backpackers who prioritize a lightweight and compact sleeping pad. However, it falls short in warmth and can be noisy, which might be a dealbreaker for some.

On the other hand, the Helix Insulated Air stands out in warmth and ease of use, making it a better option for those camping in colder conditions or who value a quiet and user-friendly sleeping pad. It's slightly heavier and less packable, but its superior insulation and comfort for back sleepers make it a strong contender.

Final Verdict: If you're a backpacker who needs a lightweight and compact pad for warmer conditions, the Big Agnes Zoom UL Insulated is the way to go. However, if you're camping in colder weather and prioritize warmth and ease of use, the REI Co-op Helix Insulated Air is the better choice.

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