Ideal combination of 3 gel bladders, high density foam shell and support base. Optimal prevention, treatment and management of pressure ulcers. One piece construction requires no assembly. 4 Elastic coer straps secures overlay to mattress. Urethane coated nylon cover is, water resistant and vapor permeable. Vinyl base is stain resistant and waterproof. Designated head and foot sections. Manufacturers 1 Year Limited Warranty on cover and mattress. Width: 34"; Depth: 76"; Height: 3.5"; Weight: 47.8 lbs.