Therm-a-Rest NeoAir XTherm NXT Review

The Therm-a-Rest NeoAir XTherm NXT is an excellent, lightweight option for backpackers who want a four season pad that ticks all the boxes – it’s warm, packs down small and also works perfectly for summer and high altitude treks.

Therm-a-Rest NeoAir XTherm NXT Ultralight Camping and Backpacking Sleeping Pad, Neptune, Regular

Good to know: this sleeping pad is unisex

Pros / Reasons to Buy

  • Excellent warmth, even at altitude and colder conditions
  • Lightweight and small packed size

Cons / Reasons to Avoid

  • Set up can be confusing, especially if you haven’t used a pad like this before
  • Sound when sleeping could be reduced

I loved this sleeping pad through my tests, I would recommend it to all backpackers for the combination of its warmth, comfort and packability, not to mention it’s weight. I tested out the regular, coming in at 1lb for this review and found it packed down extremely well in my backpacking pack. Likewise, I use a Nemo Hornet 2P and find it sits pretty much perfectly in my tent.

This sleeping pad from Therm-a-Rest is very comfortable, on one backpacking trip that I tested the NeoAir XTherm NXT, I set up my camp 4 miles along a 10 mile trail and coming back to my tent and to this pad after summiting was welcomed! The great thing as well is that this sleeping pad is offered in three sizes: regular, regular wide and large making it suitable for a range of different backpackers.

My only slight niggle with this sleeping pad is the wing lock valve, which if you’re not used to this type of operation when it comes to inflating means you may well think you’ve been sent a faulty product like I did. However, after watching some videos online, I was able to work it out and get out on the trail. So, I’d advise you do this well in advance of your first backpack just to make sure you feel comfortable with its set up!

Compare to similar products: 

Nemo Switchback
Nemo Tensor All-Season
Therm-a-Rest NeoAir Xlite NXT
Therm-a-Rest NeoAir XTherm NXT
Rab Stratosphere 4
Sea to Summit Comfort Plus Insulated
Big Agnes Divide Insulated
Nemo Quasar 3D
Sea to Summit Ether Light XT Insulated
Big Agnes Rapide SL Insulated
Exped Ultra 7R
Klymit Static V
Sleepingo Large
Tame Lands
Therm-A-Rest Z Lite Sol
NEMO Switchback Foam Sleeping Pad - Regular - Sunset Orange
NEMO Tensor All-Season Ultralight Insulated Sleeping Pad, Regular Wide
Therm-a-Rest NeoAir Xlite NXT Ultralight Camping and Backpacking Sleeping Pad, Solar Flare, Regular Wide
Therm-a-Rest NeoAir XTherm NXT Ultralight Camping and Backpacking Sleeping Pad, Neptune, Regular
Rab Stratosphere 4 Lightweight Insulated Sleeping Pad for Camping & Backpacking - Graphene - Regular
Sea to Summit Comfort Plus Insulated Camping Air Mattress, Large (79 x 25 x 2.5 inches)
Big Agnes Divide Insulated | Lightweight, Compact, 3-Season Air Chamber Sleeping Pad, Wide Regular, Warm Olive
NEMO Quasar 3D Lightweight Sleeping Pad - Insulated Regular (72'x20') - Bluebird
Sea to Summit Ether Light XT Extra-Thick Insulated Sleeping Pad, Rectangular - Regular (72 x 25 x 4 inches)
Big Agnes Rapide SL Insulated Sleeping Pad, Regular (20x72)
Exped Ultra 7R | Lightweight Backpacking Mat | Packable and Comfortable | -20 Degree 4-Season Sleeping Pad, Charcoal, Medium
KLYMIT Static V Lightweight Inflatable Sleeping Pad | Comfortable, Lightweight, Easy to Inflate Portable Air Bed Mattress for Camping, Backpacking and Hiking — Orange
Sleepingo Sleeping Pad for Camping - Ultralight Sleeping Mat for Camping, Backpacking, Hiking - Lightweight, Inflatable Air Mattress - Compact Camping Mats for Sleeping- Green, 1pk
Tame Lands Sleeping Pad for Camping Ultralight Backpacking, Sleeping Mat for Hiking, Traveling & Outdoor Activities 17 OZ (Olive Green)
Therm-a-Rest Z Lite Sol Camping and Backpacking Sleeping Pad, Limon/Silver, Regular - 20 x 72 Inches
Buying Options
Our Rating
Best Foam Sleeping Pad
Best Air Sleeping Pad
Best for Comfort and Ultralight
Best for Winter and Best Mummy Shaped Sleeping Pad
Best for Summer
Best for Side Sleepers
Best for Back Sleepers
Best Budget Air Pad
Best Rectangular Sleeping Pad
Type and Shape
Folding, closed-cell foam
Rectangular or Mummy Inflatable
Mummy Inflatable
Mummy Inflatable
Rectangular Inflatable
Mummy Inflatable
Rectangular Inflatable
Rectangular Inflatable
Rectangular or Mummy Inflatable
Rectangular Inflatable
Rectangular or Mummy Inflatable
Rectangular Inflatable
Mummy Inflatable
Rectangular Inflatable
Folding, closed-cell foam
Comfort
Low
Excellent
Excellent
Very Good
Excellent
Excellent
Very Good
Excellent
Excellent
Excellent
Excellent
Good
Average
Average
Low
Warmth/R-Value
Average (R-Value = 2)
Excellent (R-Value = 5.4)
Very Good (R-Value = 4.5)
Excellent (R-Value = 7.3)
Very Good (R-Value = 3.8)
Very Good (R-Value = 4)
Very Good (R-Value = 4)
Low (R-Value = 1.8)
Very Good (R-Value = 3.2)
Very Good (R-Value = 4.8)
Excellent (R-Value = 7)
Low (R-Value = 1.3)
Low - Average (No ASTM FF3340 rated  R-Value, but likely around 2)
Low - Average (No ASTM FF3340 rated  R-Value, but likely around 2)
Average (R-Value = 2)
Weight
Regular Version - 415g/14.5oz 
Regular Version - 522g/1lb 2oz
Regular Version - 368g/13 oz
Regular Version - 453g/1lb
Regular Version - 695g/1lb 9oz
Regular Version - 845g/29.8oz

Regular Version - 652g/23oz
Non-Insulated Regular Version - 650g/1lb 7oz
Mummy Regular - 490g/17.3oz
Regular Version - 510g/18oz

Rectangular Medium Version - 650g/23oz

Regular Version - 530g/18.7oz
408g/14oz
600g/21oz
Regular Version - 410g/14oz
Packed Size
Regular Version - 51x13x14cm/20x5x5.5in
Regular Version - 25.5x10cm/10x4in
Regular Version - 10.4x22.86cm/4.1x9in
Regular Version - 11.3x22.86cm/4.5x9in
Regular Version - 24cmx12cm/9.4inx4.7in
Regular Version - 12x23cm/5x9in
Regular Version - 20x13cm/8x5in
Non-Insulated Regular Version - 20x10cm/8x4in
Mummy Regular - 24x11cm/9.5x4.5in
Regular Version - 18x10cm/7x4in

Rectangular Medium Version - 23x14cm/9x5.5in

Regular Version - 20x8cm/8x3in
27x8cm/10.5x3in
23x10cm/9x4in
Regular Version - 51x13x14cm/20x5x5.5in
Open Size
Regular Version - 183x51x2.3cm/72x20x0.9in
Regular Version - 183x51x9cm/72x20x3.5in
Regular Version - 182x50.8x7.62cm/72x20x3in
Regular Version - 177.8x50.8x7.62cm/72x20x3in
Regular Version - 183x51x8cm/72x20x3in
Regular Version - 184x55cm/72x21.5in
Regular Version - 183x51x8.25cm/72x20x3.25in
Non-Insulated Regular Version - 183x51x9cm/72x20x3.5in
Mummy Regular - 183x55-42x10cm/72x21.5-16.5x4in
Regular Version - 51x183x11cm/20x72x4.25in
Rectangular Medium Version - 183x52x9cm/72x20.4x3.5in

Regular Version - 183x58x6cm/72x23x2.5in
187x54.6x5cm/73.5x21x2in
188x56x5cm/74x22x2in
Regular Version - 183x51x2cm/72x20x0.75in
Materials
Polyethylene foam backed with metalized foil
20D and 40D Nylon with two layers of metalized film
30D Ripstop Nylon
30D and 70D Ripstop Nylon with Thermacapture Reflective Film
75D Polyester with 100% recycled polyester 'Stratus R' insulation
30D/40D Nylon withThermolite insulation and Exkin Platinum film
Ripstop nylon with Thermalite insulaiton and heat-reflecting film  layer
100% Recycled Polyester
30D/40D Nylon withThermolite insulation and Exkin Platinum film
Ripstop nylon with two layers of metalized film
20D Ripstop polyester with down insulation
75D Polyester
Ripstop Nylon
40D Ripstop Nylon
Polyethylene foam backed with Thermacapture Reflective Film
Durability
Excellent - will still work even if torn or damaged
Good - supplied with repair patches
Good - supplied with repair patches
Good - supplied with repair patches
Good - supplied with repair patches
Very Good - supplied with repair patches and spare valve parts
Good - supplied with repair patches
Good - Supplied with repair patches
Very Good - supplied with repair patches and spare valve parts
Good - Supplied with repair patches
Good - Supplied with repair patches
Good - Supplied with repair patches
Good - supplied with repair patches
Good - supplied with repair patches
Excellent - will still work even if torn or damaged

Analysis and Test Results

Therm-a-Rest NeoAir XTherm NXT set up in tent

The Therm-a-Rest NeoAir XTherm NXT is a highly versatile sleeping pad, from testing, it performs exceptionally well in colder conditions – in fact, it has a higher R rating (measures the sleeping pad’s resistance to heat loss) than many of the other pads in our best sleeping pads round up, making it a great option for all year round.

Whilst some sleeping pads that are suitable for colder temperatures are heavier as they contain more robust materials, Therm-a-Rest have really set the bar with this product, as it comes in at 453g/1lb for the regular, and the regular wide and the large are both 635g/1lb 4oz. This is impressive and is in part due to Therm-a-Rest’s technological advances within this range (they’ve shaved significant weight from this model against its predecessor).

Performance Comparison

Therm-a-Rest NeoAir XTherm NXT thickness packed size

Type and Shape

The Therm-a-Rest NeoAir XTherm NXT is a rectangular pad that inflates. It sits in the lightweight category at 453g/1lb for the regular, and the regular wide and the large are both 635g/1lb 4oz. It is also extremely well versed for handling cold weather conditions and has a 7.3 R value (a measurement used to understand thermal resistance – the higher the R value, the better the sleeping pad resist heat loss). This means it’ll take you comfortably through four seasons without being too hot in the summer and perfect for fall/autumn and winter treks.

Therm-a-Rest NeoAir XTherm NXT mummy shape

Comfort

The pad is 7.6cm/3in. in thickness and makes use of a ‘horizontal baffled structure, which provides a lot of comfort on the trail. I found this pad was mostly comfortable and didn’t deflate in the night which was a huge plus. However, I am a side sleeper, and I still felt pressure points in my hips when I flipped over onto each side.

I’m not sure if deflating it a little would help with that, but it is a common issue with any sleeping pad I use. The pad is a little noisy when you move around on it with a sound that is reminiscent of a plastic bag being crumbled up, but other than that I slept well. It is also thin enough that it could fit into my mummy sleeping bag.

Therm-a-Rest NeoAir XTherm NXT pad thickness

Warmth

The Therm-a-Rest NeoAir XTherm NXT makes use of the brands patented Triangular Core Matrix™ construction and ThermaCapture technology. It is actually 57g/2oz. lighter than the previous model. The 7.3 R value, combined with its lightweight feel, makes it extremely versatile for colder and higher altitude backpacking trips.

I found the pad was incredibly warm and didn’t feel any drafts underneath me while sleeping. In fact, it captured more of my body heat than any other pad I’ve used to date. I could feel the heat under me and that has never happened with any other pad.

Ease of Use

Set up was fairly easy, but it requires a few dozen large breaths to fully inflate. I’d say between 3-7mins to inflate depending on how much lung capacity you have. The one-way valve/wing lock helps to maximize each breath without leakage, which I think is a nice feature.

On one of my tests, I set up camp 4 miles into a 10-mile trail, so I set up my tent and this pad before heading up the other 6 miles to the summit and then returned. It was nice to have it set up before I returned, and it was a relief that it was so comfortable after such a long day of hiking.

But I can see how trying to set this up at high altitude when you’re exhausted from hiking for miles could be tiring in itself trying to inflate this pad. It would be nice if it had a partially self-inflating feature so that all that is required is a few additional puffs to fully inflate it.

Taking it down was fast and easy with the wing lock valve you use to deflate it. It took maybe 2mins to deflate and fold it up into the stuff sack. The material compresses very easily when it’s time to fold it down and get the last of the air out and then put it in the stuff sack. I did not use the included pump sack.

Weight

The Therm-a-Rest NeoAir XTherm NXT comes in three sizes, a regular, regular wide and large and as you can imagine, this does have an impact on the weight. The regular is 453g/1lb, and the regular wide and the large are both 635g/1lb 4oz. Really, this weight isn’t particularly noticeable between models.

At the weights offered, particularly the regular, this pad sits firmly in the lightweight category and is great if you are trying to shave considerable weight off your backpacking gear. The weight savings offered on this sleeping pad are thanks in part to Therm-a-Rest’s Triangular Core Matrix™ construction and ThermaCapture technology. This pad comes in at 57g/2oz lighter than the previous model.

Version
Weight
Regular
453g/1lb.
Regular Wide
635g/1lb 4oz.
Large
635g/1lb 4oz.
Therm-a-Rest NeoAir XTherm NXT logo

Packed Size

Depending on the size option you go for, it packs down slightly differently, as can be expected. The regular sits at 11.3 x 22.86cm/4.5 x 9 inches, and the regular wide and large at 12.7 x 27.94cm/5 x 11 inches. So, as you can see whilst there is a difference it is fairly minimal, and for my tests, I used the regular size.

This pad barely took up any space in my pack. And even when it’s in the stuff sack it still squishes down a little more so you can pack around it. It was a welcome way to reduce size and weight without sacrificing warmth, comfort, and durability.

Version
Packed size
Regular
11.3 x 22.86cm/4.5 x 9 inches
Regular Wide
12.7 x 27.94cm/5 x 11 inches
Large
12.7 x 27.94cm/5 x 11 inches
Therm-a-Rest NeoAir XTherm NXT size compare

Open Size

The Therm-a-Rest NeoAir XTherm NXT comes in three size options, and this does have an impact on the opened size. This is where all three start to differ and what you choose here will be based on your size and sleeping area you need. The regular is 177.8 x 50.8 x 7.62cm/72 x 20 x 3 inches, the regular wide is 177.8 x 63.5 x 7.62cm/72 x 25 x 3 inches and the large is 195.58 x 63.5 x 7.62cm/77 x 25 x 3 inches.

For my review, I worked with the regular, which as a 5’8” women at 160-170lb felt right for me. This pad fit into my tent perfectly. I have the Nemo Hornet 2P tent and it fit easily with several inches above and below my feet.

Version
Open size
Regular
177.8 x 50.8 x 7.62cm/72 x 20 x3 inches
Regular Wide
177.8 x 63.5 x 7.62cm/72 x 25 x 3 inches
Large
195.58 x 63.5 x 7.62cm/77 x 25 x 3 inches
Therm-a-Rest NeoAir XTherm NXT set up

Features

The Therm-a-Rest NeoAir XTherm NXT is a well featured sleeping pad. From my tests, I like the wing lock valve, but it’s not intuitive that the wing lock and the black valve are separate features. When I first tried to inflate at home, I thought I needed to open the wing lock valve, which I did, but I didn’t open the black valve.

So, I blew into it about 15 times and thought I had a faulty product. Then I watched an online video and saw that I have to open the black valve to inflate. The wing lock valve only needs to be opened on deflation. That could be clearer in the instructions.

Also, once opened, the black valve closes fairly easily as you’re blowing into it. Sometimes after removing my mouth to take a breath, the black valve would close and I’d have to retwist it open and then take care not to put too much pressure on it so it wouldn’t close on me. That said, I still loved this sleeping pad and the warmth to weight ratio feels like one of its best features.

Therm-a-Rest NeoAir XTherm NXT adjustment

Materials

This sleeping pad makes use of a 70 denier nylon on the bottom which is excellent for withstanding tears and also uses a 30 denier ripstop nylon top. The materials are well produced and keep this pad feeling good for multiple uses on trail.

Therm-a-Rest NeoAir XTherm NXT inflation valve

Durability 

On my most recent backpacking trip where I used this sleeping pad, I found out that 2 other friends also have this sleeping pad and they love it. Based on my experience, I think this pad is very durable and that it will last for the long term. The material feels thick, but easily compressible and it folds up into its stuff sack easily with little resistance. When laying on it, it felt sturdy and substantial, not flimsy. The wing lock looks secure, and the black valve also seems to be well crafted.

Of course, the way you look after your products will make a difference too and we would always recommend that a sleeping pad like this is stored well at home. Likewise on the trail it’s always a good idea to make sure that the pad has protection under it. Whether that be from your tent base or a sheeting such as Tyvek if sleeping outside your tent, to keep it protected from any potential abrasions.

Sustainability

Therm-a-Rest make no special claims about the sustainability of this sleeping pad, however when you consider how well built this pad feels, alongside the fact that it works beautifully in all four seasons as well as its weight, there’s a pretty good chance that for many backpackers this could be the only pad you need. This obviously helps in terms of sustainability, because how much we buy, and the number of products has a direct impact on wastage and production.

Therm-a-Rest NeoAir XTherm NXT adjustment valve

Price

This sleeping pad certainly comes in at the upper end of the scale of the sleeping pads we’ve tested in our best sleeping pads round up. However, from the features and the especially warm finish that the Therm-a-Rest NeoAir XTherm NXT offers, this doesn’t seem excessive.

If you’re a cold sleeper, you will likely find this sleeping pad to be an incredible option, and given its versatility as a lightweight option too, being perfect for all four seasons, the fact that you should be able to use this pad all year round does make it seem like a great value proposition. It’s built to last from a well known and well-respected brand, so these are all plus points in its favor!

Therm-a-Rest NeoAir XTherm NXT inflation sack

Conclusion

The Therm-a-Rest NeoAir XTherm NXT is a well featured sleeping pad that is exceptional in colder temperatures, but also works comfortably all year round. It does come in at a fairly premium price point, but considering what it offers, it’s well worth the money you’ll spend on this new piece of kit. From my tests, I’ve found myself loving it and would highly recommend it to all backpackers.

The sleeping pad currently comes in three sizes also, making it suitable for a range of different backpackers. The area where I really feel like this pad excels was in the warmth that it offered me on my camps, even at higher altitudes. In fact, it’s the warmest sleeping pad I’ve ever slept on and this in part is what keeps it feeling comfortable all night.

There are a few niggles about the wing lock valve, which I do think could be explained better in the user instructions, however after watching some videos online, I got it set up and it’s been relatively easy going since then. If you’ve got the money to invest, I would say that the Therm-a-Rest NeoAir XTherm is well worth it and will help you take your adventures to the next level.

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