Apex™ Gel Foam Cushion, 16 x 16 x 3 Inch, 1 Each Dressing Aids 20 x 18 * Designed Style:Pair (Left & Right) 20 x 18 * Designed to provide a comfortable functional and stable sitting environment * 3 poly vinyl interconnected air cells are easy to setup inflate and adjust * Easy to handle and transport: weighs only 1 lb * Includes pump and patch repair kit * Includes a reusable washable cover * 12 month limited manufacturers warranty * trouble free electronics eliminate battery changes in most installations Design cools and reduces body interface pressure: Dual density foam layers provides a soft top entry layer promoting direct interface with cooling gel pod and a higher density base layer for support and pressure distribution This top design brings the gel pod up close so you can feel the superior comfort and stability