Built with backpackers, bikepackers and backcountry adventurers in mind, the Ether Light XR is an idealSpring to Autumn sleeping mat. Air Sprung Cell construction provides plush, stable comfort without sacrificing weight, packability or durability. The Ether Light XR eases you to sleep with its 10cm of plush comfort. A long day on the trail deserves a great night’s rest with minimum effort. The Airstream pump integrated into the stuff sack and a high-airflow XPRESS valve make inflation and deflation quick and simple. Lean into the ThermalCore technology which increases insulation while keeping weight and volume low. So toss it in your pannier or backpack and head into the backcountry knowing that your sleep comfort is one less thing to worry about. Sea to Summit Ether Light XR Insulated ASC Mat - Large 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.