The Ether Light XR is the thickest and warmest sleeping mat in Sea To Summit's Ultra Light range, due to using the new Thermal Core® insulation and redesigned oval-shaped dot welds. These improvements have allowed STS to produce their lightest, warmest, most durable and compactable ultra-light range of mats resulting in a true four-season performance for backpacking, lightweight camping, bikepacking and sea kayaking.

Thermal Core® - Is a layer (in the Ether Light XR) or multiple layers (in the Ether Light XR Pro) of a reflective film that is suspended between the dot welds of the mat. The film reflects the radiant warmth of the sleeper back to the body and reduces air movement within the mat to a minimum, ensuring effective real-world insulation. Ether Light mats are highly regarded by lightweight, comfort-oriented users. Thermal Core enhances the functionality of these market-leading mats.

Features

• 4.1 R-Value is perfect for cold-weather adventures.
  
• At four inches thick, Ether Light XR Air Sprung Cells provide a plush sleeping experience regardless of your sleeping position.
  
• Thermal Core® insulation fills the inner space and includes a film that reflects infrared radiation preventing heat loss due to convection and internal air movement.
  
• Lighter, quieter and more durable 30D/40D face fabric with Sea to Summit’s liquid-extruded lamination is extremely reliable.
  
• Quick and easy inflation, deflation and adjustment are made possible by our
• XPRESS valve and supplied Airstream Pump/stuff sack.
  
• An 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.

Specifications

• Season Use: 4-Season
• Intended use: backpacking, lightweight camping, bikepacking and sea kayaking.
• Colour: Grey
• Compressed Size: 20.5 x 11cm
• Length: 183cm
• Width: 55cm
• Thickness: 10cm
• R-value: 4.1
• Weight: 525g
• Fabric: Durable 30D/40D nylon