The most premium hybrid in the Posturepedic Collection, the Sealy Posturepedic Hybrid Lacey 13"" Firm Mattress features upgraded cooling with a cool-to-touch cover, high-density motion-reducing coils, breathable memory foam and gel foam. Essentially, everything you need to enjoy a longer, deeper and more restorative sleep. The reinforced mattress edge increases durability, while the cover keeps the mattress protected. Its firm surface and body deliver extra support which is ideal for back and stomach sleepers.