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Sea to Summit Ether Light XT Insulated Mat (Rectangular Regular Wide)

Enhancing the comfort of cold-climate sleeping, the Sea to Summit Ether Light XT Insulated Mat boasts a 10cm thickness, all while maintaining an impressively low weight.

This ultralight 3-season backpacking sleeping mat offers an R-value of 3.2 and exceptional comfort thanks to a rectangular wide fit. Crafted with a combination of lightweight 30/40D Nylon, Exkin Platinum®, and THERMOLITE® insulation, utilizing a loop baffle Air Sprung Cell™ construction. This mat is ideal for side sleepers as it offers increased height, allowing hips to sink deeper without touching the ground. The looped TPU baffles and Air Sprung Cell™ dot weld pattern create larger air pockets between the top and bottom fabric layers. This unique design requires less fabric, making the mat both lightweight and luxuriously comfortable. Effortless inflation is achieved with the carefully crafted integrated stuff and pump sack.

Pair this mattress with a Seat To Summit Aeros pillow for the best night's sleep. Sea To Summit's unique pillows interlock with their sleeping to prevent them from sliding around so you can focus on getting a good night's sleep. 


  • eXtra Thick (XT) loop baffle Air Sprung Cells™.
  • Thicker THERMOLITE® layer for increased warmth.
  • Lightweight, quiet and grippy 30/40D Nylon fabric, field repairable with included self-adhesive patches.
  • Exkin Platinum® and THERMOLITE® for insulation.
  • Air Sprung Cells™ for a more comfortable sleep.
  • Ultra-Fresh® anti-microbial treatment to the TPU formula to prevent internal mould growth.
  • Multi-functional, high flow-rate valve.
  • PillowLock™ attaches your Aeros™ pillow to your mat, holding it in XT means place for a slip-free sleep.
  • Stuff sack with integrated airstream pump sack.


    • Colour: Grey
    • Compressed Size: 11 x 28cm
    • Length: 183cm
    • Width (at widest point): 64cm
    • Thickness: 10cm
    • R-value: 3.2
    • Weight: 630g

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