Self-Inflating Sleeping Pads of Foam Lightweight Self-inflating/deflating freeflow valve, no pump needed.Faster inflating and deflating Abrasion resistant Long-term durability.High density foam interior provides support Durable non-corrosive brass valves provide rapid inflation and deflation Lightweight rolls-up tightly for Compression straps for compact storage and easy transport seasonspring,autumn and winter,Comfortable and warm