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Therm-a-Rest NeoAir XTherm NXT Review

This sleeping pad is the lightest 4-season pad we've ever seen while also being the warmest in our lineup
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therm-a-rest neoair xtherm nxt sleeping pad review
The NeoAir XTherm NXT is warm enough for the coldest conditions and still really light and packable.
Credit: Sam Schild
Price:  $240 List
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Manufacturer:   Therm-a-Rest
By Sam Schild ⋅ Review Editor  ⋅  Sep 27, 2023
81
OVERALL
SCORE


RANKED
#1 of 16
  • Comfort - 30% 8.0
  • Weight - 30% 7.8
  • Warmth - 20% 10.0
  • Packed Size - 10% 8.0
  • Quality of Construction - 10% 6.0

Our Verdict

We are huge fans of the uber-warm Therm-a-Rest NeoAir XTherm NXT. This newest version has everything we've always loved about the XTherm while being quieter, lighter, and warmer. This pad is lightweight and extremely packable, and it has one of the warmest warmth-to-weight ratios of any pad we've seen. A highly functional inflation valve makes deflating it a breeze — the valve is lightyears beyond the functionality of most you'll find. The XTherm NXT has topped our charts for years, and we still haven't found another pad that truly rivals the Therm-a-Rest NeoAir line. All in all, the XTherm offers phenomenal performance. Get the skinny on how it stacks up against other top products in our full article on the best sleeping pads.
REASONS TO BUY
Packs away small
Very warm
Included pump sack doubles as a stuff sack
Versatile
REASONS TO AVOID
Some edge collapse
Expensive
Editor's Note: We updated this article on September 27, 2023, to update our metrics after a summer testing session.

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Star Rating
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Bottom Line This is one of our all-time favorite pads since it has an incredible warmth-to-weight ratioThe most recent iteration of a long-lasting, cozy, lightweight, and adaptable sleeping padThis is a very affordable pad that inflates easily into a comfortably plush air mattressIf you want a light pad on a budget, it's hard to beat this oneA lightweight sleeping pad that won't break the bank and makes a great addition to winter sleep systems
Rating Categories Therm-a-Rest NeoAir... Therm-a-Rest NeoAir... Nemo Quasar 3D Insu... Klymit Static V2 NEMO Switchback
Comfort (30%)
8.0
8.0
9.0
7.0
3.5
Weight (30%)
7.8
8.6
5.1
7.3
8.3
Warmth (20%)
10.0
7.3
6.1
4.2
4.9
Packed Size (10%)
8.0
9.0
8.5
9.5
3.0
Quality of Construction (10%)
6.0
6.0
9.0
8.0
10.0
Specs Therm-a-Rest NeoAir... Therm-a-Rest NeoAir... Nemo Quasar 3D Insu... Klymit Static V2 NEMO Switchback
Measured Weight 16.0 oz 13.6 oz 25.0 oz 17.7 oz 14.5 oz
Claimed R-Value 7.3 4.5 3.3 1.3 2.0
Thickness 3.0 in 3.0 in 3.5 in 2.5 in 0.9 in
Tested Length 72 in 72 in 72 in 72 in 72 in
Tested Width 20 in 20 in 20 in 23 in 20 in
Packed Volume (L) 2.4 L 2.0 L 2.1 L 0.9 L 8.9 L
Bottom Material 70D nylon 30D rip HT nylon 100% PCR PU polyester ripstop 75D polyester PE Foam
Insulation Technology Triangular Core Matrix construction and ThermaCapture technology Triangular Core Matrix construction and ThermaCapture technology PrimaLoft 100% PCR Not stated Closed-cell foam and low-emissivity film
Double Size Available No No Yes No No
Type Air construction, synthetic insulation Air construction, synthetic insulation Air construction, synthetic insulation Air construction Closed-cell foam

Our Analysis and Test Results

Therm-a-Rest revised the NeoAir XTherm NXT in a significant way. The dimensions and valve remain the same, but the pad is now lighter, warmer, thicker, and quieter than previous versions. It still has the awesome Winglock valve but is now made with a thicker 70D fabric to increase durability. This sleeping pad was already great, but we think the latest version is even better. This is the pad we reach for whenever the temperatures are going to be extremely cold overnight because we know it will reliably keep us warm and comfortable all night.

Performance Comparison


The 7.3 R-value offers a warm sleeping experience.
Credit: Sam Schild

Comfort


We tested the NeoAir XTherm NXT without a tent to push the limits of its insulating capabilities. This pad has a claimed R-value of 7.3 and kept us comfortably warm all night long, even as the temperatures dipped well below freezing. It has horizontal baffles that are three inches thick, and even when we set it on top of a sizable rock, we still found it to be exceptionally cozy and not overly boundy. We could only feel the ground when we were kneeling directly on the pad. Side sleepers won't have any trouble settling into an ergonomic posture either — you can slightly deflate the pad for maximum comfort without worrying that your hips will sink all the way through. The XTherm provides a great balance of all the most important factors.


Previous versions of this pad were considerably louder than the newest iteration. This is a welcome improvement, and while the crinkling sound this pad makes isn't completely gone, it's definitely quieter. Those sensitive to rustling and crinkling sounds from their sleeping pad might still not love how the XTherm isn't silent, so this is something to keep in mind before making your final decision.

therm-a-rest neoair xtherm nxt sleeping pad review - the neoair xtherm nxt is thicker than previous versions of this pad...
The NeoAir XTherm NXT is thicker than previous versions of this pad, making it even more comfortable.
Credit: Sam Schild

The XTherm shape tapers on the bottom half, and the fabric is pretty slippery. This makes it slightly less comfortable, but it also provides excellent warmth to weight in a tiny package. If you don't mind the extra weight, the Regular Wide or Large sizes of this pad are worth checking out since they'll give you more room to sprawl out.

therm-a-rest neoair xtherm nxt sleeping pad review - the neoair xtherm nxt makes a very nice backcountry bed.
The NeoAir XTherm NXT makes a very nice backcountry bed.
Credit: Sam Schild

Weight


The NeoAir XTherm NXT is quite light, especially considering the warmth it provides. On our scale, this pad weighed exactly one pound. With the pump sack included, it weighs 2.5 ounces more. This is considerably lighter than the previous model.


No other four-season pads even come close to the packed size and weight of the NeoAir XTherm NXT. This model even outperforms the majority of three-season pads in terms of weight and packed size, even those with R-values less than half that of this one. It rolls up into a surprisingly small package and comes with a sizable stuff pouch that the pump sack and pad fit inside. Even when wearing gloves, it's simple to tuck this pad into its stuff pouch, which comes in handy on chilly mornings. It's pretty annoying to have to remove your gloves to pack away outdoor equipment made for all four seasons.

therm-a-rest neoair xtherm nxt sleeping pad review - the neoair xtherm nxt is even lighter than previous versions of this...
The NeoAir Xtherm NXT is even lighter than previous versions of this sleeping pad.
Credit: sam schild

Warmth


We are confident in claiming that the NeoAir XTherm NXT is one of the warmest sleeping pads we've evaluated after using it across a large gradient of temperatures. It uses Thermacapture reflecting heat technology and has a claimed R-value of 7.3, leaps and bounds above everything else in our lineup.


In terms of insulation technology, the NeoAir XTherm NXT is at the top. Even the warmest insulated pads typically have synthetic fiber insulation on the inside, which, while effective, makes for a noticeably thick and hefty pad. The XTherm's reflective metalized coating is exceptionally good at reflecting heat.


When deflated, this pad is also exceedingly light and portable compared to fiber insulation versions. Our team has slept on the XTherm all over the Western United States and even in Alaska. We use it as the standard for all other pads because of its warmth, portability, and light weight.

therm-a-rest neoair xtherm nxt sleeping pad review - the neoair xtherm nxt is a great overall sleeping pad for cold...
The NeoAir XTherm NXT is a great overall sleeping pad for cold conditions.
Credit: Sam Schild

Packed Size


Most sleeping pads with high R-values will take up a huge amount of space in your pack, but with the XTherm, you might not even need a bigger backpack for cold-weather backpacking. This sleeping pad packs smaller than many other pads we tested, even though it's the warmest.


The XTherm NXT easily rolls and packs away in its stuff sack down to a size similar to a 1-liter water bottle. It's not quite as small as some other sleeping pads, but those don't have as much insulation, either. When packed up, the XTherm is small enough to fit anywhere in your pack that any other pad would, whether in an external pocket or buried deep in your pack, next to your sleeping bag and tent.

The NeoAir XTherm NXT packs down incredibly small given its high...
The NeoAir XTherm NXT packs down incredibly small given its high R-value.
The XTherm NXT packs down smaller than sleeping pads with half the...
The XTherm NXT packs down smaller than sleeping pads with half the R-value.

Quality of Construction


The XTherm NXT is very well constructed. The seams and welds are robust, and the underside material is thick enough to take the abuse of being repeatedly thrown on the ground. We've used the XTherm NXT and other earlier versions for long stretches in the backcountry. Unless you purposely toss it down on cactus-filled desert sand, you shouldn't have any problems with durability.


The underside of the XTherm NXT is now made of an even thicker 70D material, which is confidence-inspiring. The last thing you want when cold weather camping is to have your pad stop holding air, so we're happy to see this thicker fabric in the high-wear area. Your purchase also comes with an included patch kit.

therm-a-rest neoair xtherm nxt sleeping pad review - we never had any issues with our neoair xtherm nxt leaking.
We never had any issues with our NeoAir XTherm NXT leaking.
Credit: Sam Schild

The Winglock valve is also excellent and substantially more resilient than the prior valve system. It inflates quickly and easily, doesn't lose air, and deflates immediately if you open it while you're lying on the pad. A set of wings flip the main valve from inflate to deflate mode. When set to inflate, the valve doesn't allow air to escape, which is one of the biggest differences from the past system.

Accompanying the Winglock valve, the supplied pump bag easily locks onto the system. In past iterations, you had to exert a lot of effort to slide a rubber ring around the valve. The valve on the new pump bag is more prone to popping off if too much pressure is applied, but it does have significantly better airflow and is easier to use. Although it may be annoying, this is probably in place to prevent the pad from popping and getting damaged by excessive inflation.

therm-a-rest neoair xtherm nxt sleeping pad review - the xtherm nxt's winglock valve and pump sack allow for easy...
The XTherm NXT's Winglock valve and pump sack allow for easy inflation.
Credit: Sam Schild

We've used the XTherm with and without the inflation bag. Overall, we never found it too difficult to simply inflate this pad with our lungs — it generally took us about 40 breaths. Not using the inflation bag saves you some weight as well, but we know breathing heavily just to inflate your sleeping pad at the end of a long day of backpacking isn't everyone's idea of a good time.

therm-a-rest neoair xtherm nxt sleeping pad review - the winglock valve is a chunkier and more substantial valve than...
The Winglock valve is a chunkier and more substantial valve than previous valves used by Therm-a-Rest, and it allows for significantly faster inflation and deflation.
Credit: Sam Schild

Should You Buy The Therm-a-Rest NeoAir XTherm NXT?


Although the NeoAir XTherm NXT might put a pretty substantial dent in your bank account, it offers amazing value in the end. This pad retails for almost twice as much as most of the other pads in our review, but it weighs approximately the same and is twice as warm. This is one of the most adaptable and best-performing models that we've ever gotten our hands on, and it's a solid option if you're looking for a pad that delivers warmth, comfort, lightweight packability, and exceptional ease of use.

What Other Sleeping Pads Should You Consider?


If you love the overall design of this pad but don't need quite so much warmth, we recommend the Therm-a-Rest NeoAir XLite NXT. If you want a 4-season sleeping pad that's more comfortable and you don't care about the packability and weight, we recommend the Sea to Summit Ether Light XT Extreme.

Sam Schild