CUSHION, FOAM W/C 18"X16" Pressure reduction cushion designed to assist in the prevention, treatment and management of pressure ulcers Fire retardant polyurethane foam shell Viscous gel-bladder provides optimum support and comfort Designed for clients who are at low risk for skin breakdown Removable and replaceable cover has water resistant "Top" and "Non-Slip" vinyl base 18 Month Limited Warranty on cover and cushion