Gel/Foam cushions are designed for optimum weight distribution and prevention of skin breakdown. High quality foam combined with lightweight gel increases cushion volume and reduces overall pressure for improved mobility. Segmented gel bladder contains an aqueous, highly viscous gel surrounded by a high density foam shell that is covered using a fluid-proof medical grade beige rip stop vinyl. Shipping Carton Size: 20" L x 18" W x 6" H (51 cm x 45.7 cm x 15 cm).