The Ether Light XR Insulated Air Sleeping Mat uses ThermalCore® insulation with quiet, lightweight and grippy fabric and 10cm-high Air Sprung Cells for comfort in colder conditions. Other features include a XPRESS valve for easy inflation, deflation and fine tuning, an Airstream™ pump integrated into the stuff sack for quick inflation and the PillowLock system to hold your Sea to Summit pillow in place. The extra height of the mat makes it ideal for side sleepers so your hip stays off the ground during your sleep.