Attaches to a mattress with adjustable corner straps to create a 3" static air cushion for patients at risk of skin injury. Features two inflation valves for use with manual hand pump (included) or electrical inflator, as well as a CPR release valve for rapid delfation. Specifications: 18 gague, medical grade vinyl Weight: 4 lb Weight capacity: 260 lb 6-month warranty Dimensions: 76"L x 33"W x 3"H (inflated)