The Sea to Summit Comfort Light Insulated Sleeping Mats feature hybrid layer Air Sprung Cell technology - a double layer of high resolution cells in the torso for maximum comfort and insulation, and single layer of medium resolution cells in the head and legs for reduced weight. Sea to Summit uses Exkin Platinum, a quiet non-woven fabric, to reflect radiant heat loss back to the user and Thermolite insulation to prevent convective heat loss between your body and the ground. Features:Exkin Platinum fabric and Thermolite insulation are combined to prevent radiant and convective heat loss Thickness: 2.5"Multi-function valve for easy inflation, deflation and fine tuning of air pressure 40D rip-stop nylon face fabric offers the right balance between weight and durability Sea to Summit TPU lamination process - one used in the medical and aeronautical industries but unique to the outdoor industry - is vastly