Thermarest NeoAir XTherm NXT

Thermarest NeoAir XTherm NXT

The lightest and most insulating 4-season expedition air mattress with an R-Value of 7.3 and a thickness of 7.6 cm.

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The opinion of Aventure Nordique

The NeoAir Xtherm NXT is Thermarest's ultra-lightweight expedition mattress! It has an R-Value of 7.3 according to ASTM F3340-18, which makes it by far the lightest 4-season mattress on the market for this insulation. It is perfect for winter bivouacs and expeditions on skis, snowshoes and for all cold weather adventures!

This mattress is the warmest in the NeoAir range. It is equipped with ThermaCapture technology, which is a high-performance thermal insulation system. It is composed of multi-layers that form a reflective barrier: heat is reflected towards the body and the cold coming from the ground is blocked. This innovative system provides a real feeling of warmth. It has a Thermarest specific Triangular Core Matrix structure with widthwise bulges.

The NeoAir Xtherm NXT is very comfortable with its 7.6 cm thickness and compressible. Its volume is equivalent to a one-litre water bottle, which saves space in the rucksack compared to a classic self-inflating mattress. Its mummy shape saves space and weight. The mattress is strong and durable, with a reinforced 70 denier nylon and anti-slip fabric on the underside and 30 denier nylon on the top.

It is equipped with the latest valve from Thermarest. The WingLock valve allows for faster inflation and deflation. It has a non-return valve that prevents air from escaping during inflation. The mattress is supplied with a storage bag and a pump bag that prevents moisture from being blown into the mattress.

Technical details

Manufacturer Therm-A-Rest
Product name NeoAir XTherm NXT
Season 4 season
Type air chamber
Form Mummy
R-Value 7.3
    • Top: 30D rip HT Nylon
    • Bottom: 70D Nylon
    Colour Grey
    Length R : 183 cm - RW : 183 cm - L : 196 cm
    Width R : 51 cm - RW : 64 cm - L : 64 cm
    Thickness 7,6 cm
    Folded R : 23 x 11 cm - RW : 28 x 13 cm - L : 28 x 13 cm
    Weight R : 440 g - RW : 540 g - L : 570 g
    Accessories Repair Kit, Storage bag, Inflation Stuff Sack
    Warranty Lifetime
    Country of Manufacture Ireland


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