Offers maximum protection to guard against the incidence of pressure sores. Incorporate the best features and benefits of gel and foam. Our viscous gel, migrates through sectioned bladders to provide proper immersion and envelopment of the bony prominences with over 80% surface coverage. Sculptured low profile, resilient foam surrounds the gel to provide the proper combination for optimum pressure redistribution. A high density foam base supports the entire mattress for maximum weight distribution and durability. The Vyvex-I top cover is a soft non-shear nylon material that helps to reduce heat and moisture build-up. The bottom cover is a durable medical grade vinyl. Both materials are fluid and stain resistant, anti-microbial, and fire retarda- Overlay Mattress, 3", Full Size Mfr. Direct