Multi-layered high density foam provides optimal pressure redistribution * The ultra soft heel section is uniquely designed to provide extremely low skin interface pressure * The mattress cover is a 2-way stretch water resistant vapor permeable nylon * The cover provides a low moisture transmission rate (MVT) which keeps the patient cool and dry * Meets fire code 1633 * 7 Year Limited Warranty * Top layer of foam is high resilient and die-cut which provides comfort and proper pressure redistribution