Sea to Summit Ether Light XT Insulated Mat

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R-rating 3.0 - 3.9

Quick overview

Sea to Summit's lightest, thickest and quietest full size Air Sprung Cell™ Mat with insulation for three-season comfort.

Refining lightweight cold-climate sleeping comfort, this mat combines a lightweight 30/ 40D Nylon fabric, Exkin Platinum® and THERMOLITE® insulation with a loop baffle Air Sprung Cell™ construction to create a 10cm thick mat with an incredibly low weight.

Larger air pockets are created by using many looped TPU baffles which connect the top and bottom fabric layers with Sea to Summit's Air Sprung Cell™ dot weld pattern. The looped baffles allow the top and bottom layers to be positioned further apart creating larger pockets of air when inflated that require less fabric overall. Perfect for side sleepers, the extra height of this mat lets hips sink deeper into it without touching the ground.


Sea to Summit Ether Light XT Insulated  Small Regular Large
R-value 3.2 3.2 3.2
Thickness (cm) 10.0 10.0 10.0
Width (cm) 55 55 64
Length (cm) 168 183 198
Weight (grams) 470 490 625
Inflation type Airstream Pump Airstream Pump Airstream Pump
Insulation material Synthetic Synthetic Synthetic
Packed dimension (cm) 24 x 11 24 x 11 28 x 13
Intended use Trekking, Camping Trekking, Camping Trekking, Camping


  • Includes an Airstream™ Pump that is integrated into the stuff sack for quick and easy inflation
  • Extra thick (XT) loop baffle Air Sprung Cells™ for a more comfortable sleep
  • Lightweight, quiet and grippy 30/40D Nylon fabric, field repairable with included self-adhesive patches
  • Exkin Platinum® and THERMOLITE® for insulation
  • Ultra-Fresh® anti-microbial treatment is added to the TPU formula to prevent internal mould growth
  • Air Sprung Cells™ for a more comfortable sleep
  • Multi-function, high flow-rate valve
  • PillowLock™ attaches your Aeros™ pillow to your mat, holding it in place for a slip-free sleep


  • Mat: 100% nylon
  • Valve 100% TPU
  • Insulation: 100% polyester
  • Stuff Sack: 100% nylon