Experience the best of Beautyrest with the Black Series Two 15.5"" Medium Mattress, featuring advanced temperature management technology, premium foams, and advanced, Triple-Stranded Pocketed Coil Technology for conforming support and motion separation. Micro Diamond Memory Foam offers a specialized upgrade for cooling comfort, as the foam, infused with heat-conducting diamond particles, is designed to help move heat away from the body for a cool sleep. With the inclusion of premier materials and advanced sleep technology, the Beautyrest Black Collection optimally aligns at the intersection of luxury and innovation for an extraordinarily comfortable sleep.