A convenient, affordable and easy-to-use overlay that attaches to any standard healthcare mattress/ Functions include alternating pressure and low air-loss/ Easy-to-use weight dial for customized therapy/ Easy-to-clean, waterproof, quilted nylon cover reduces shear and friction/ Sturdy adjustable straps securely attach the overlay to any mattress/ Weight capacity: 300 lbs. / Dimensions: 36 x 80 x 5" (91 x 203 x 20 cm)