Product Details + Double side buckle promises no air leak and long lasting performance. Quickly inflate via first layer of valve and deflate via second layer.Double-layer Composite Process equips it better rip-stop, compression resistance and watertightness:1.Outer layer: Rip-stop Nylon Fabric with TPU coating;2.Inner layer: TPU Sealing Coating.Just piece together several inflatable sleeping mats to gain a larger one.Easy to Deflate and StoreDeflate and fold into a narrower strip— our product is quite folding resistant;Buckle on side snap fasteners and roll up from the top to the bottom tightly;Put on 2 elastic bands and pack it into storage bag.