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In the late 2000s, Therm-a-Rest revolutionized the sleeping pad with the NeoAir XLite, which was lighter, warmer, and more comfortable than the prevailing self-inflating pads of the day. While other brands have since developed competing products, the XLite has remained dominant among weight-conscious backpackers. But Therm-a-Rest’s newest offering just might change that dynamic.

This summer I slept on the new ($195, 8.8 ounces) for five weeks in West Virginia’s Appalachians, Alaska’s Brooks Range, and Yosemite National Park. It kept me warm in temperatures down to 30 degrees Fahrenheit, incurred no holes or blown seams, and was acceptably comfortable.

Due to its weight, it’s a very attractive option for backpacking in three-season conditions, for which the UberLite provides sufficient insulation. 

The UberLite competes most directly with the Big Agnes Insulated AXL Air ($180, 10.6 ounces). Between the two, it’s a toss-up: the UberLite is marginally lighter, the AXL is slightly more comfortable, both cost about the same, and both push the limits of fabric and construction technologies. Go to the store and test-sleep both; or order both, try them at home, and decide which one you want to keep.

If your pad needs to work beyond three-season conditions, your answer is still the ($185, 12 ounces), which is more durable, costs ten bucks less, and is 60 percent warmer than the UberLite and the Insulated AXL Air. 

UberLite Specs

• Sizes: small, regular, and large
• Weight: 8.8 ounces (250 grams) for regular
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• Materials: 15-denier ripstop nylon on top, and 15-denier nylon on the bottom
• Thickness: 2.5 inches 
• Cost: $180 MSRP for regular

Comfort

If you’ve spent a night on the XLite or the warmer XTherm, the UberLite will feel very familiar. All three pads are 2.5 inches thick, feature horizontal baffles of uniform height, and taper slightly toward the foot end.

Without “guardrails” to help cradle the sleeper, wider bodies should consider the large pad, which is five inches wider and taller (and 3.2 ounces heavier and $30 more expensive) than the regular. For context, I wear slim or very slim medium shirts and find the regular size suitable, but not with much margin.

Noise

Unlike the XLite, Mylar film isn’t used in the construction of the UberLite. That means it’s less warm but also less crinkly. Sleeping on the XLite has rightly been compared to sleeping on a bag of potato chips.

The UberLite is quieter than the XLite, but it’s not absolutely quiet. The fabrics are crispy and can replicate the sound of balloons being rubbed together when laid atop some shelter-floor fabrics.

My experience with the XLite, XTherm, AXL, and now UberLite is that these pads make less noise with age and when paired with older shelter floors. Repeated folding of the pad seems to soften the materials, and normal use seems to buff the fabric coatings.

Warmth

The insulating properties of a sleeping pad are quantified by the R-value, which measures how well something resists conductive heat transfer. The higher the number, the warmer the pad. The UberLite has an R-value of 2.0. Anecdotally and quantitatively, it’s not as warm as the XLite, which has an R-value of 3.2. The UberLite’s optimal temperature range feels close to the Insulated AXL Air, whose R-value is not publicly known.

The lowest temperature I experienced with the UberLite was 30 degrees. I was extraordinarily comfortable, but context matters here: I was sleeping on a soft bed of Arctic tundra and on my backpack, which were complementing the UberLite’s warmth. More often, nighttime temperatures during my testing were in the forties; I slept on gravel bars, pine needles, mineral sand, granite slabs, and plain old dirt. In general I’m very adept at finding campsites that are inherently warm—it’s rare that I sleep on cold, damp, hard-packed ground. So your mileage may vary.

The coldest I ever got with the UberLite was in West Virginia, when I was camping in a bridge hammock atop a windy ridge with temperatures in the low thirties. By 2 A.M. I was too cold to sleep, so I dropped the hammock to the spruce-needle-covered ground, which was a much warmer arrangement.

Overall, I would describe the UberLite as a true three-season pad. In the Mountain West, that means June through mid-September. In the Eastern woodlands and desert Southwest, you can add one to two months on both sides. Undoubtedly, the UberLite is a less capable pad than the XLite, which I unhesitatingly pack for hunting trips in the Colorado Rockies in November and early-season backpacking trips in May, when I might have to sleep on snow.

Durability

My UberLite has not yet developed any holes or bulges. I wouldn’t expect the latter, since delamination of the internal tubes is a very long-term issue. To avoid the former, I’m careful with it—every night I protect the UberLite with a tent floor or bivy sack, a plastic pack liner, and my backpack.

But don’t be mistaken: the UberLite is a delicate pad. Keep it away from sharp rocks, thorns, and needles. Don’t use it as a sitting pad during rest breaks or around the campfire. And keep it inside a stuffsack when it’s in your pack.

I also don’t store the UberLite (or any other pad) in the same way that it arrives from the factory. Instead of folding it in thirds and then rolling it, I roll up the pad full width and then fold it in half. This technique avoids sharp creases in the fabrics, which I think improves long-term durability, and it’s faster and less fussy.

If you read through reviews of the UberLite, you’ll see quite a few comments to the effect of, “It developed a hole on the second night, and I returned it.” I get the sense that there are (or were) lemons being produced, and I’d advise you to test out your UberLite before you rely on it; you can do this by inflating it at home, weighting it with something, and making sure that it holds air for a few days.

Inflation and Deflation

The UberLite retains the tried-and-true stick valve that Therm-a-Rest has been using since at least the early 2000s. The valve restricts the rate of inflation and deflation, but I don’t mind: my respiratory system, not the valve, is the limitation during inflation. And deflation is acceptably quick if I release it while still lying on the pad. Recently, I timed this process—it took 60 seconds from opening the valve to putting it inside a stuffsack.

How It Compares

How does the UberLite stack up against other popular sleeping pads?

Therm-a-Rest UberLite Versus Therm-a-Rest XLite

Compared to the ($185, 12 ounces), the UberLite is:

• 3.2 ounces lighter and $10 more expensive
• just as comfortable but less noisy
• less abrasion- and puncture-resistant

Therm-a-Rest UberLite Versus Big Agnes Insulated AXL Air

Compared to the Big Agnes Insulated AXL Air ($180, 10.6 ounces), the UberLite is:

• 1.8 ounces lighter and equally expensive
• less comfortable: it’s thinner and lacks oversize outer tubes
• similar in warmth
• comparable in durability

Therm-a-Rest UberLite Versus Klymit Static V Ultralite SL

Compared to the ($120, 12 ounces), the UberLite is:

• 3.1 ounces lighter
• $75 more expensive
• warmer
• less suitable for rolling sleepers