inflatable seat pad great for camping,traveling,Picnicking etc, inside foam,outside fabric ... .Materials:Heavy Fabric(or nylon,dacron) Coated Vinyl(PVC) or TPU With A Built-in plastic Valve With Cap,inside 21D ... self inflating foam and an air valve through which the pad can be further inflated / deflated to suit the users comfort6 ... 's size, logo, packing,and color is available. inflatable seat pad