multi-layered, high density foam for optimal pressure redistribution. Top layer of foam is high resilient and die-cut. Ultra-soft heel section provides extremely low skin interface pressure. Mattress cover is 2-way stretch, water resistant, vapor permeable nylon and hygiene has a low moisture transmission. Meets fire code 1633. #15886-36x76 #15870-80x36 #15884-84x36 UNSPSC#42191810