The Ether Light XT Insulated Mat offers lightweight cold-climate sleeping comfort. Its made from a combination of lightweight 30/40D Nylon fabric, Exkin Platinum thermal fabric and Thermolite insulation with a loop baffle Air Sprung Cell construction to create a 10cm thick mat with an incredibly low weight. The Air Spring Cell construction welds the top and bottom layer fabric and is combined with looped TPU baffles to create large air pockets which allow the insulation to fully loft. Perfect for side sleepers, this construction also adds extra height which allows hips to sink deeper without touching the ground. The Sea To Summit multi-functional valve integrates an inflate port with a one-way valve to prevent air loss before you seal the valve, a rapid air dump deflate port, and a fine tune button to adjust for comfort, in one compact, low profile unit.