The XTherm mattress is the warmest mattress in the NeoAir collection, allowing you to go lighter than ever in winter conditions. Patent-pending Reflective Barriers give the XTherm™ mattress true 4-season warmth without the weight or bulk usually found in a winter-worthy mattress. The result is a mattress that weighs less than a pound, takes up less pack space than your water bottle, and provides serious comfort in extremely cold conditions. Pump sack and repair kit included.
View our Mattress Comparison Chart
View specs in printer-friendly format| S | M | Regular | L | |
| Color | Reflex Gray | Reflex Gray | Reflex Gray | Reflex Gray |
| R-Value | 5.7 | 5.7 | 5.7 | 5.7 |
| Weight | 11 oz / 310 g | 14 oz / 410 g | 15 oz / 430 g | 1 lbs 4 oz / 570 g |
| Width | 20 in / 51 cm | 20 in / 51 cm | 20 in / 51 cm | 25 in / 63 cm |
| Length | 47 in / 119 cm | 66 in / 168 cm | 72 in / 183 cm | 77 in / 196 cm |
| Thickness | 2.5 in / 6.3 cm | 2.5 in / 6.3 cm | 2.5 in / 6.3 cm | 2.5 in / 6.3 cm |
| Packed dimension | 9 x 3.3 / 23x 9 | 9 x 4.0 / 23 x 10 | 9 x 4.0 / 23 x 10 | 11 x 4.5 / 28 x 11 |
| Top fabric type | 30d High Tenacity Nylon | 30d High Tenacity Nylon | 30d High Tenacity Nylon | 30d High Tenacity Nylon |
| Bottom fabric type | 70d Nylon Soft Grip | 70d Nylon Soft Grip | 70d Nylon Soft Grip | 70d Nylon Soft Grip |
| Core | Nylon | Nylon | Nylon | Nylon |
| Country of Origin | Made in Seattle, USA | Made in Seattle, USA | Made in Seattle, USA | Made in Seattle, USA |

Winner of the a GOLD OutDoor INDUSTRY AWARD 2011, the NeoAir XTherm mattress was selected for its “ultra-effective” warmth and for being “extremely lightweight and beautifully designed at the same time.” The only mattress to chosen for a GOLD award from a pool of 301 product submissions, the jury called it “Absolutely perfect!”

Winner of a 2013 Editor's Choice award from the German magazine Outdoor, the NeoAir XTherm mattress was recognized for it's light weight, packability and perfect insulation for 4-season warmth.