The Sea to Summit UltraLight Insulated Mat is a sleeping pad that keeps weight and packed size to a minimum without sacrificing comfort. The unique Air Sprung Cell design ensures that your body weight is distributed and evenly supported by the inflated chambers. The inside of the pad also Features synthetic Thermolite Insulation and a layer of reflective film to prevent heat loss. It packs down to little more than the size of a water bottle, making it great for backpacking or bikepacking, and the stuff sack works double duty as a pump sack so you don't need to drain your lungs after a long day. Features of the Sea to Summit UltraLight Insulated Mat Single layer Technology with exkin platinum and thermolite Insulation Constructed as a single layer of medium resolution cells Prevents convective heat transfer Reflects radiant heat Air sprung cell Inside mat: White tpu with antimicrobial treatment Included stuff sack Pillow lock system Fabric Details 30D/40D Nylon