Tri-laminate design. Perfectly matched Med-Flex VPF foams throughout all layers. Pressure redistribution Hexon top layer. Heel Wrap VPF foam incorporated in top layer for prevention of heel ulcers. Med-Flex VPF foam pressure redistribution center layer. High-density Med-Flex VPF foam bottom layer. Vyvex I nylon, fluid proof top cover. Barrier Lok infection control system. All Med-Flex VPF foams and cover materials are anti-microbial and fire retardant. 5 year non-prorated warranty.