Ether Light XR is the thickest and warmest sleeping mat in our Ultra Light range, due to using new insulation, Thermal Core®. The Air Sprung Cells still provide four inches of stability and comfort, while Thermal Core® insulation prevents convective heat loss and internal air movement. This results in true four-season performance perfect for backpacking, light weight camping, bikepacking and sea kayaking.

Features

• 4.1 R-Value is perfect for cold weather adventures.
• At four inches thick, Ether Light XR Air Sprung Cells provides a plush sleeping experience regardless of your sleeping position.
• Thermal Core® insulation fills the inner space, and includes a film that reflects infra-red radiation preventing heat loss due to convection and internal air movement.
• Lighter, quieter and durable 30D/40D face fabric with Sea to Summit’s liquid-extruded lamination is extremely reliable.
• Quick and easy inflation, deflation and adjustment is made possible by our XPRESS valve and supplied Airstream Pump/stuff sack.
• Anti-microbial treatment added to the TPU lamination formula prevents internal mold growth.
• PillowLock system prevents your Sea to Summit Aeros Pillow from slipping.
• Comes with a stuff sack which doubles as a pump, a repair kit with six self-adhesive patches and a spare valve insert.