Thermarest NeoAir Xtherm Max SV Large Sleeping Mat

R-Value: 1.00 / Dimensions: 196 x 63 x 6.3cm / Packed Size: 28 x 11cm
Weighs 706g (excluding bag)
Code: SS18047
  • Now £219.99
  • (FREE UK & EU Delivery)
+ In Stock Now | Usually dispatched within 24 hours

Thermarest's NeoAir XTherm Max mats combine the comfort of an airbed with the insulation value required for sleeping in the coldest conditions and on snow. Now featuring Thermarests's SpeedValve for faster inflation and deflation. 

Therm-a-Rest says:

The XTherm MAX SV air mattress delivers lightweight warmth with soft, textured no-slip fabric for better next-to-skin comfort and a quieter rest. Multiple reflective ThermaCapture layers give the XTherm true four-season warmth without the weight or bulk usually found in a winter-worthy mattress. Our revolutionary SpeedValve delivers lightning-fast inflation and deflation during your cold-weather adventures. Stuff sack and repair kit included.

Triangular Core Matrix

Our most advanced design uses patent-pending technology to minimize heat loss with two stacked layers of triangular baffles, creating hundreds of individual cells in our warmest mattresses. Simultaneously this internal structure adds an unmatched level of stability to every NeoAir mattress.


ThermaCapture Radiant Heat Technology is a proprietary reflective coating that we apply to a range of surfaces. By reflecting radiant heat back to your body that is otherwise lost, this extremely lightweight coating turns that surface into a very efficient heat reflector, amplifying warmth without the excess weight or bulk of added, conventional insulating materials.

The Therm-a-Rest NeoAir Xtherm Max SV mat is an ultralight workhouse, built to inflate fast and keep you insulated in extreme conditions. It's excellent insulation is down to the multiple layers of ThermaCapture, which is an innovative, proprietary material that reflects heat and minimizes heat loss without adding extra weight or bulk. An ideal choice for alpinists, ultralight backpackers and anyone seeking the most comfort per gram.

What makes these Thermarest mats stand out from others is the new SpeedValves (SV). The SpeedValve is a revolutionary inflation method that uses simple physics to inflate your mattress three times faster than pads with a traditional valve. When it's time to break camp, the auto-reversing valve deflates your pad instantly. It's a remarkable way of inflating your mat with negligible effort - watch the video - you'll be amazed.

- Reviewed by Ultralight Outdoor Gear

Help and advice:
  • Extreme warmth; ultralight package: Patent-pending, reflective ThermaCapture technology and Triangular Core Matrix construction reduce weight without compromising warmth.
  • Fast Inflation: SpeedValve pulls in surrounding air to amplify your breath, inflating the mattress in half the time of traditional valves.
  • Max Comfort: 2.5” (6 cm)-thickness, soft-touch fabrics and baffled internal structure provide unrivaled stability and support. MAX shape provides added coverage.
  • Small Packed Size: Free of bulky, conventional insulating materials, the XTherm mattress packs to the size of a one-liter water bottle.
  • Faster Deflation: Auto-reversing SpeedValve deflates mattress in a flash.
  • Dimensions: 63 x 196cm (25 x 77in)
  • Thickness: 6.3cm (2.5in)
  • R-Value: 5.7 (US) / 1.00 (SI)
  • 30D HT Nylon / 70D Nylon
  • Weight: 706g (excludes bag)
  • Storage bag weighs: 16g
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