PressureCheck Mattress Support System 36 x 84 x 6 36 x 84 * For pressure relief comfort and durability * Features gel foam with sections that adjust individually to distribute weight and relieve interface pressure * Ultra-soft heel zone that lowers pressure for sensitive heels * High-density bottom layer of compression-resistant foam for support weight distribution and extended mattress life * 7 year non-prorated replacement guarantee on foam components