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Big Agnes Zoom UL Insulated Sleeping Pad Review

Jude Glenn bio photo
Jenny Abegg author bio
ByMultiple Authors
Jul 09, 2025
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Our Take:
3.4/5

The Big Agnes Zoom UL Insulated ($200) looks great on paper—lightweight, compact, and rated for three-season use—but it doesn’t fully deliver in real-world conditions. In our testing, it underperformed in colder temps and frustrated us with a handful of design quirks. The thin shell also requires babying. For ounce-counters sticking to mild weather and well-groomed campsites, it may be a decent option. But for most backpackers, we’d recommend more well-rounded alternatives.

Comfort

Comfort

3/5
Warmth / Weight

Warmth / Weight

3.5/5
Packed Size

Packed Size

4.5/5
Durability

Durability

1.5/5
Ease of Use

Ease of Use

1.5/5
Sustainability

Sustainability

3.2/5

Type

Air

R-value

4.3

Weight

14 oz.

Packed Size

8 x 4 in.

Thickness

3.5 in.

Fabric(s)

Nylon

Pros

Tiny packed size.
More affordable than the competition.
Rectangular shape with side rails cradles the body.

Cons

Fragile shell with a slippery surface.
Two-way valve is slow to deflate and can leak air.
Stuff sack is frustratingly small.

For a breakdown of this season's top models, see our guide to the Best Backpacking Sleeping Pads.

The Big Agnes Zoom UL Insulated impressed me with its plush and supportive feel for such an ultralight sleeping pad. With 3.5 inches of cushioning and a honeycomb baffle design, it cradled my body nicely and kept my shoulders and hips off the rocky desert ground in Havasupai. As someone used to narrower, mummy-shaped pads, the Zoom UL’s wide, rectangular profile felt downright luxurious, even for my 6’3” frame.


That said, it’s not a home run in terms of comfort. The nylon surface is a bit slick under a sleeping bag, and there’s a noticeable crinkle to the fabric, although it’s quieter than pads like the Therm-a-Rest NeoAir XLite. Still, for its weight and packability, the Big Agnes Zoom UL strikes an appealing balance, offering more comfort than many of its ultralight peers without overloading the scale.

On paper, the Big Agnes Zoom UL Insulated delivers a strong warmth-to-weight ratio: a 4.3 R-value at just 14 ounces puts it only a step behind the Therm-a-Rest NeoAir XLite NXT (4.5 R-value, 13 oz.). In mild desert conditions with nighttime temps in the 60s, it kept me warm and comfortable. But in cooler alpine environments (nights dipping into the low 40s), another Better Trail tester found the pad noticeably lacking in insulation, even with a 20-degree bag. She grew cold from the ground up and had to resort to layering extra clothing on top of the pad to stay warm.


This experience echoes what we’ve seen in user reviews: while the Zoom UL’s specs are impressive, the real-world warmth doesn’t always hold up in colder temps. In other words, its R-value isn’t all it’s chalked up to be. Our 3/5 rating reflects this inconsistency. To be clear, the Zoom UL is competitively lightweight (only the 13-oz. NeoAir Xlite and 8.5-oz. Nemo Tensor Elite undercut it), but it’s not the sleeping pad we’d rely on for shoulder-season chill or mountain overnights.

The Big Agnes Zoom UL Insulated packs down impressively small—just 4 by 8 inches for the regular size. That said, it does take a bit of wrestling to get it into its compact stuff sack. Each morning, I had to take the time to fully deflate the pad and roll it up precisely. It seems clear that Big Agnes prioritized keeping the packed size as streamlined as possible, but I would certainly have preferred a slightly roomier sack for ease. Once packed, the Zoom UL forms a tidy little cylinder that slips easily into the side pocket of my backpacking pack.


For context, the Big Agnes Zoom UL packs down smaller than its larger competitors, such as the Sea to Summit Ether Light XR (8.1 x 4.3 in.) and Nemo Tensor All-Season (10 x 4 in.), and is essentially tied with the Therm-a-Rest NeoAir XLite (9 x 4.1 in.). It’s only slightly larger than the ultralight Nemo Tensor Elite (about 7 x 3 in.), which has significantly compromised warmth and durability. For fast-and-light missions where space is at a premium, its compact size is one of the pad’s strongest assets.

The Big Agnes Zoom UL Insulated prioritizes low weight, which is evident in its materials. Big Agnes doesn’t list a denier spec like some competitors, but the fabric feels thin, slick, and slightly crinkly—more reminiscent of tent fly material (à la the Copper Spur) than a rugged sleeping pad. While I haven’t experienced any punctures yet, I’ve treated the pad with extra caution on rocky or abrasive surfaces. I’d hesitate to use the Zoom UL without a footprint or inside shelters with questionable flooring. Big Agnes does include a solid repair kit (patches, valve seal, and storage sack), but compared to more robust pads like the Nemo Tensor All-Season, the Zoom UL falls short in overall ruggedness.

The Big Agnes Zoom UL comes with a lightweight roll-top inflation sack that doubles as the stuff sack. It’s intuitive to use—just scoop, roll, and squeeze—and typically takes about 6 to 8 full bags to inflate the pad. Still, the integrated design feels somewhat clunky and lacks the sleekness and efficiency of the dedicated pump sacks from Nemo or Therm-a-Rest. On the plus side, I appreciated only having one piece of gear to manage at camp.


The Big Agnes Zoom UL uses a single valve for both inflation and deflation. Inflation is straightforward, but deflation is more tedious—there’s no dump valve, so you have to manually hold the tab open while squeezing out the air. Compared to the faster, more refined dedicated deflation valves on pads from Therm-a-Rest or Exped, the Zoom’s feels slower and slightly less confidence-inspiring. (Several user reviews report leaks, and the two-way valve could be part of the problem.) The Zoom UL also loses ease-of-use points for its stuff sack—getting the pad back inside after use often felt like a mini workout. Ultimately, this pad is one of the least refined I’ve used, prioritizing weight savings over convenience.

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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.

I typically opt for wide sleeping pads to give my shoulders a bit more breathing room, and for the Zoom UL, I tested the Long Wide version. At 25 inches wide and 78 inches long, it offered ample space to stretch out without worrying about sliding off during the night. The Zoom UL is available in three rectangular sizes—regular, wide, and long wide—which is great for those who prefer a roomier sleep surface. That said, for a pad that places such a premium on weight savings, it’s interesting that Big Agnes doesn’t offer a mummy or short version. Still, for taller users or anyone who tosses and turns, the Zoom UL’s sizing options provide a welcome level of comfort without an extreme weight penalty.

Big Agnes Rapide SL ($170): Big Agnes’ More Reliable Standby
Big Agnes aimed for ultralight innovation with the Zoom UL, but we think their Rapide SL remains the better all-around pad. For $30 less, it delivers more reliable warmth (its 4.8 R-value holds up in real-world use) and is only 4 ounces heavier. It doesn’t pack quite as small, but it’s far easier to use thanks to its two-valve system—one for inflation, one for deflation—and a dedicated pump sack. In the end, the Rapide SL feels like a thoughtfully built pad, while the Zoom UL comes off more like a weight-cutting experiment. For more, read our review of the Rapide SL.

Therm-a-Rest NeoAir XLite ($210): A Better Pad for Just a Little More
On paper, the NeoAir XLite and Big Agnes Zoom UL look nearly identical: both weigh around 13 to 14 ounces and boast R-values above 4 (4.5 for the XLite, 4.3 for the Zoom UL). But in practice, the NeoAir is the better pad across the board. It uses 30-denier fabric that feels noticeably more durable, has a superior inflation system that separates inflate and deflate valves for faster setup and takedown, and doesn’t require a wrestling match to get it back into the stuff sack. What’s more, it’s lived up to its R-value in our testing, while the Zoom UL has fallen far short. Yes, the XLite costs $10 more and it’s not quite as plush at just 3 inches in thickness (compared to the Zoom UL’s 3.5 in.), but it’s the smarter buy for most ultralight backpackers. To learn more, read our NeoAir XLite review.

Big Agnes Zoom UL Insulated ($180)
Baffle design of Big Agnes Zoom UL Sleeping Pad
3.4/5

The Big Agnes Zoom UL Insulated ($180) looks great on paper—light and compact with a three-season R-value—but it falls short in real-world use. It underperforms in cold temps, has some frustrating design quirks, and the thin fabric requires extra care. For most backpackers, better all-around options are worth the added weight or cost.

Type
Air
R-value
4.3
Weight
14 oz.
Packed Size
8 x 4 in.
Thickness
3.5 in.
Fabric(s)
Nylon
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Comfort

3/5
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Warmth / Weight

3.5/5
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Packed Size

4.5/5
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Durability

1.5/5
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Ease of Use

1.5/5
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Sustainability

3.2/5
Big Agnes Rapide SL ($170)
Big Agnes Rapide SL sleeping pad baffle design
4.5/5

The Rapide SL Insulated proves that standout comfort doesn’t always need a big price tag to match. This pad’s cushion, warmth, and weight should make it appealing for a wide variety of backpackers, although we’d prefer a larger stuff sack.

Type
Air
R-value
4.8
Weight
1 lb. 2 oz.
Packed Size
7 x 4 in.
Thickness
3.5 in.
Fabric(s)
Nylon
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Comfort

4/5
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Warmth / Weight

4/5
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Packed Size

4.5/5
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Durability

3/5
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Ease of Use

3.5/5
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Sustainability

2.3/5
Therm-a-Rest NeoAir XLite NXT ($210)
Close up of the Therm-a-rest Neo Air XLite Sleeping Pad thickness
4.7/5

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.

Type
Air
R-value
4.5
Weight
13 oz.
Packed Size
9 x 4.1 in.
Thickness
3 in.
Fabric(s)
30D nylon
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Comfort

3/5
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Warmth / Weight

4.5/5
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Packed Size

4/5
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Durability

3/5
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Ease of Use

3.5/5
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Sustainability

2.3/5

Is the Zoom UL for You?

The Big Agnes Zoom UL Insulated is built for ultralight-focused backpackers and thru-hikers looking for a sleeping pad with three-season capability and a standout packed size. On paper, its warmth-to-weight ratio is impressive—but in real-world use, the pad falls short of its R-value and comes with a few design quirks that give us pause. As a result, it’s hard to recommend the Zoom UL over better-executed alternatives. For just a bit more money, the Therm-a-Rest NeoAir XLite offers superior warmth, more reliable performance, and a more durable build—all without adding bulk or weight.

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