Vinyl base is stain resistant and waterproof|New and improved gel overlay has an upgraded 300 lb weight capacity and optimizes pressure redistribution|15 gel bladders cover entire patient contact area|Full length “head-to-toe” gel bladders minimize “bottoming out” and “pitting”|New convoluted foam topper vastly improves patient comfort and air circulation|4 elastic corner straps secure overlay to mattress|Urethane coated nylon cover is water resistant and vapor permeable|Bladders contain an aqueous non-toxic gel and polystyrene beads|Designated head and foot sections