This insulated sleep mat is designed for campers seeking warmth and comfort while sleeping on the trail. With warm Exkin Platinum fabric and Thermolite insulation to help prevent heat loss, the Sea to Summit Comfort Light Insulated Sleeping Mat is the key to comfortable cool-weather outdoor sleep. Material: 40D Nylon. Insulation: Thermolite (synthetic). 4.2 R-Value: Warm enough for all 4 seasons and perfect for cold weather adventures.. Exkin Platinum fabric and Thermolite insulation are combined to prevent radiant and convective heat loss.. Multi-function valve for easy inflation, deflation and fine tuning of air pressure.. 40D rip-stop nylon face fabric offers the perfect balance between weight and durability.. Liquid-extruded TPU bonds permanently to shell fabric, virtually eliminating delamination. Antimicrobial treatment added to the TPU helps prevent mold issues caused by warm, moist air trapped inside the mat. Includes an Airstream pump integrated into the base of the stuff sack . Extended storage instructions: Mat should be laid flat and folded as few times as possible with valve open.. Thickness: 2.5 in.. Dimensions: 72 x 21.5 x 2.5 in. Packed size: 4.5 in. x 9 in.. Weight: 1 lb., 5.8 oz.. Spot clean. Imported.