Optimal overlay surface for the prevention and treatment of pressure ulcers. * Convoluted high density polyurethane foam top layer. * Bladders contain an aqueous gel composition that provides deep submersion. * Cover is a soft nylon urethane coated vapor permeable water proof fabric. * Top cover is non-shear, low-friction, and anti-microbial/bacterial. * Gel maintains room temperature at all times. * Weight capacity: 275 lbs. * SIZE: 34″ x 78″ x 3″