The Ether Light XT Extreme is extra thick and exceptionally warm. The XT Air Sprung Cells provide 4" of stability and comfort, while dual-density layers of THERMOLITE® insulation prevent convective heat loss and internal air movement. The result: true four-season performance.

Our blog post "Which Sleeping Mat to Choose" has some helpful tips on picking the perfect air mat (or reasons why you might prefer a Self-Inflating sleeping mat).

• The R-Value of 6.2 is tested according to the ASTM F 3340-18 standard.
• Extra thick (XT) Air Sprung Cell construction for 4" stable comfort
• Dual-density layers of Thermolite® insulation fill the inner space, preventing heat loss due to convection and internal air movement.
• Quick and easy inflation, deflation and adjustment with the multi-function, high flow-rate valve and supplied Airstream™ Pump Sack
• Pillow Lock™ attaches an Aeros™ pillow to mat
• Lightweight, quiet and grippy 30/40D Nylon face fabric
• Repair kit with 3M self-adhesive patches included for puncture repair
• Anti-microbial treatment added to the TPU lamination formula prevents internal mold growth