Skil-Care, Seat Cushion Thin-Line 18 W X 16 D X 1 H Inch Foam / Gel, 1 EachProduct Description Two chamber wheelchair flotation cushion that combines the comfort and therapeutic effectiveness of gel and foam Water based gel lowers interface pressure and cools to eliminate skin damaging perspiration High density foam prevents bottoming out Low shear outer cover reduces skin damaging friction removes for easy laundering Incontinent proof vinyl cover prevents urine from entering cushion Wipes clean for easy care Safety strap