Wild CampingTherm-a-RestSleeping Pad

Therm-a-Rest NeoAir XTherm NXT sleeping pad review: your new 4-season staple

Just as packable as its predecessor and comes with the same mind-bending warmth-to-weight ratio.

✓  Best BuyTherm-a-Rest NeoAir XTherm NXT Weight440 gR-value7.3Price~£220+ The good✓  Luxuriously comfortable (7.6 cm thick)
✓  Market-leading warmth-to-weight ratio
✓  Packs to 1-litre bottle size
✓  Easy to inflate with included sack
✓  Significantly quieter than predecessor
✓  Durable 70D underside
✓  Repair patches included
The not-so-good✗  Expensive at £220+
✗  Valve confusing to use for first-timers

At a glance

Overview

Therm-a-Rest is one of the most notable brands when it comes to producing warm, packable and reliable sleeping pads. They have been behind some of the most innovative products on the market, starting with the world’s first-ever inflatable sleeping pad way back in the 1970s. The Therm-a-Rest NeoAir XTherm NXT is the brand’s latest iteration of their long-loved and super warm XTherm sleeping pads, delivering an industry-leading 7.2 R-value in a pad that weighs under 500 grams (440 grams for the regular version). So, is this pad worth the hype?

On paper, the Therm-a-Rest NeoAir XTherm NXT simply cannot be beaten. For its weight, it delivers the highest R-value available today, easily beating the likes of the Sea to Summit Ether Light XT Extreme, the popular Nemo Tensor or the Exped Ultra 7R. At 440 grams, there is simply nothing out there that weighs so little yet delivers so much warmth. The pad also packs down smaller than these other big players, rolling up to the same size as a 1-litre bottle of water.

Naturally, this level of tech does not come cheap. When bought new, the Therm-a-Rest NeoAir XTherm NXT will set you back well over £200. You cannot buy these directly from Therm-a-Rest, so you will have to shop around at various online retailers to find the best deal — we have never seen them for anything under £220. And while that puts the pad firmly at the top end of the price spectrum, it is worth understanding that there is not much in it when compared to heavier pads with a lower R-value. The Sea to Summit Ether Light XT Extreme — one of our most highly-rated pads for 4-season UK adventuring — costs £188. The Nemo Tensor, which has an R-value 40% lower than the XTherm, has an RRP of £200. So despite the XTherm being one of the most expensive pads on the market, you genuinely get what you pay for.

How we tested

We used the Therm-a-Rest NeoAir XTherm NXT extensively through the winter of ’23 and ’24. We took it on a 3-day circular of the western Brecon Beacons, used it on a handful of mid-week overnights when it got eerily cold, and took it with us on another 3-day wild camping adventure through Scotland’s Cairngorms National Park in January. On that Cairngorms trip, we put the pad up against sustained freezing temperatures — where the air temperature hit –9°C — used it one night in a bothy to see how it performed in warmer conditions, and carried it up and over an untold number of Munros to understand what it is like to lug this pad around in your pack under real-world UK winter conditions.

Features and performance

Warmth and comfort

The first notable thing worth diving into with the new XTherm is the thing that sets it apart from all other pads on the market: its warmth-to-weight ratio. Weighing 440 g and coming with an R-value of 7.2, no other pad delivers as much warmth for every gram carried. And that is not just marketing fluff. In our experience, the pad is as warm as Therm-a-Rest makes it out to be, keeping us toasty warm and comfortable in temperatures down to –9°C. The warmth the XTherm delivers makes it our clear go-to for any lightweight winter backpacking trips when space and weight are a consideration. And as it is so easy to carry, we will almost certainly use this in the shoulder seasons too.

Being 3 inches thick (7.6 cm) when fully inflated, the pad is remarkably comfortable. While we still think the Sea to Summit Ether Light XT Extreme is a slightly more comfortable pad to sleep on (being thicker and wider), the full package of the XTherm is arguably a better all-rounder: it is smaller, lighter and more comfortable to carry on long day hikes. The gains are marginal, and we see ourselves leaning on the Sea to Summit pad when we want the extra comfort and the XTherm NXT when weight and pack size are important.

One final thing worthy of note is the noisiness of the insulation. In its predecessor, the foil insulation would rustle and crunch as you rolled around. Even though this was never a big issue, the narrative quickly became one of “sleeping in a crisp packet.” Thankfully, Therm-a-Rest has solved this problem to a large degree in the NXT version. This latest iteration is quieter and remarkably less crisp-packet-like when you roll around on it. The pad still makes a bit of noise when you move, but never enough to become a disturbance.

“In our experience, the pad is as warm as Therm-a-Rest makes it out to be, keeping us toasty warm and comfortable in temperatures down to –9°C.”

Pack size and weight

When it comes to pack size and weight, this is where the pad simply cannot be beaten. It weighs 440 grams (regular) and packs down to the same size as a 1-litre water bottle. Truly phenomenal — we have yet to find a 4-season sleeping pad as small and light as the XTherm NXT.

Inflating and deflating

The pad comes with an easy-to-use inflation sack that allows you to pump it up in under a minute. This clips onto the WingLock Valve for easy inflation without needing to blow into it yourself — which matters for two reasons. First, any moisture that collects inside the bag may turn to ice in freezing conditions and affect the pad’s thermal efficiency. Second, that same moisture would stay in your pad indefinitely, causing it to get mouldy over time and affecting the life of the product.

To deflate, simply open the WingLock Valve and press out the air, then roll from the bottom up towards the valve, fold, and roll back into the stuff sack. The only criticism we have is almost certainly down to user error: when we first tried to inflate it, a team member who had never used a Therm-a-Rest before could not figure out how to open the valve. The instructions on the WingLock Valve are not particularly clear. To open it fully, you need to untwist both the WingLock Valve and the nozzle itself — something Therm-a-Rest does not make particularly clear in their own literature.

Durability

The Therm-a-Rest NeoAir XTherm NXT is constructed from 70D ripstop nylon on the underside and a lighter-weight 30D ripstop nylon on top. This adds extra durability where you need it most while keeping the pad as lightweight and packable as possible. We found the pad to be plenty durable, although you will always need to be careful with pads of this type.

As they are basically a super technical balloon, we always recommend clearing any bracken or sticks from the ground before pitching your tent. If you are sleeping in a tent with a super thin bathtub floor, pair it with a groundsheet. Thankfully, should anything happen overnight, Therm-a-Rest includes several repair patches — which we luckily never had to test — that should bring your pad back to life in a pinch.

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Our verdictNothing else out there comes close on warmth-to-weight. The ultimate 4-season pad.We really rate the Therm-a-Rest NeoAir XTherm NXT. When it comes to the warmth-to-weight this pad delivers, there is simply nothing else out there. If you are looking for a lightweight and packable pad you can use on all of your 4-season UK adventures, there is not much point in entertaining any other competing lines right now. The XTherm delivers everything you could ever want from a premium 4-season sleeping pad, with no identifiable compromises. Supremely light, super warm and remarkably easy to carry.As long as you can stomach the high price, it will support you on all spring, autumn and winter adventures for years to come.

FAQs

How warm is the Therm-a-Rest NeoAir XTherm NXT sleeping pad?Incredibly warm. With an R-value of 7.3, it is all you need for any 4-season adventures in the UK — and it offers market-leading warmth-to-weight at just 440 g for the regular version.

How comfortable is the Therm-a-Rest NeoAir XTherm NXT?Very comfortable. Despite being thinner than some other winter pads, at 7.6 cm thick it is still excellent whether you sleep on your back or side. The NXT version is also significantly quieter than its predecessor — the crisp-packet rustling is largely solved.

How easy is the Therm-a-Rest NeoAir XTherm NXT to inflate?Very easy once you know how. The included inflation sack clips onto the WingLock Valve and inflates the pad in under a minute. Key tip: you need to untwist both the valve and the nozzle itself to open it fully — something Therm-a-Rest could make clearer in their literature.

Is the Therm-a-Rest NeoAir XTherm NXT worth the money?Yes. Despite costing over £200, the warmth-to-weight ratio is unmatched on the market. For true 4-season camping where weight and pack size matter, it is a worthy investment — if you can afford it.

How durable is the Therm-a-Rest NeoAir XTherm NXT?Remarkably durable for such a lightweight pad. The underside is 70D ripstop nylon — hard to pierce and robust. The top is a lighter 30D nylon, so make sure you pitch it the right way up and clear debris from the ground first. Repair patches are included.