Three layers provide pressure distribution and weight equalization to meet the unique demands of the bariatric patient Medium density foam base Visco elastic memory foam topper for superior comfort and pressure relief. Positions the user with a moderate slope from front to back Non-aqueous specialized visco-elastic gel core layer reduces tissue interface pressure at critical points Proprietary gel is a flexible solid that will not leak Gel is placed at three pressure zones Features 4 Cushion Strap to secure cushion firmly to the chair 650 lb maximum weight capacity Cover Features Fluid-proof stretch top cover, reduces shear/friction Antimicrobial Flame retardant Removable and washable Non-skid base Warranty 18-month limited warranty 1 Each/ Each