Maximum protection against the incidence of pressure sores for patient weights up to 1 000 lbs * Allows for proper immersion and envelopment around the bony prominences as well as providing pressure redistribution * Top: Medium Density PPF Foam * Center: Medium Density PPF Foam * Base: High Density PPF Foam * Top Cover: Medical Grade Vinyl * Bottom Cover: Medical Grade Vinyl * 12 month limited warranty