The Sleep Zone 5 Mattress is a gently firm vitalized zone mattress that envelops your body with a blend of pressurized multi-density and highly resilient foam. This mattress is covered in Belgian damask and tailored to last. The exclusive Otis Comfor t Lock Cushioning System tensions all the materials inside to develop a specific comfort level that is consistent over the life of the mattress. Performance testing proves this technology is the key to substantially reducing body impressions