Thermarest – NeoAir XTherm Mattress

More warmth per gram than any other air mattress in the world makes this an ideal four season hiking and backpacking mattress.



More warmth per gram than any other air mattress in the world. The XTherm™ air mattress delivers the greatest warmth-to-weight ratio available in any air mattress by far with a softer textured no-slip fabric for better next-to-skin comfort and a quieter rest. Multiple reflective ThermaCapture™ layers give the XTherm™ air mattress true four-season warmth without the weight or bulk usually found in a winter-worthy mattress. Stuff sack and repair kit included.


Unmatched Warmth-to-Weight: Patent-pending reflective Thermacapture™ technology traps radiant heat while Triangular Core Matrix™ construction minimizes convective heat loss–all without the bulk, weight or durability issues of down and synthetic fills.

Excellent Comfort:  6cm thickness, soft-touch fabrics and baffled internal structure provide unrivaled stability and support.

Highly Packable: Free of bulky conventional insulating materials, the XTherm mattress packs to the size of a one litre water bottle.

Ultralight:  Advanced materials and a tapered design reduce weight without compromising warmth.

Weight 570 g
Dimensions 28 × 11 cm

Regular, Large

Regular Large
R-Value 5.7 5.7
Weight (Metric) 0.43 kg 0.57 kg
Width (Metric) 51 cm 63 cm
Length (Metric) 183 cm 196 cm
Thickness (Metric) 6.4 cm 6.4 cm
Packed dimension (Metric) 23 cm x 10 cm 28 cm x 11 cm
Top fabric type 30D rip HT nylon 30D rip HT nylon
Bottom fabric type 70D nylon 70D nylon
Core Nylon Nylon

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