The low viscosity fluid filled bladders are sewn into the covers and utilize a series of strategically placed baffles that control the flow of the fluid. Additionally, the GSS Deluxe Foam Cushion’s gentle contours provide comfort and help reduce forward sliding. The GSS Deluxe Cushion is constructed of comfortable and durable molded polyurethane foam. The waterproof vinyl cover features a 4-way stretch SoffTICK® cover and a non-skid vinyl bottom to prevent the cushion from sliding forward. Meets CA #117 flame retardancy standards.