The Beautyrest Black® Series Two Firm mattress features the best of Beautyrest®, 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® Series Two Firm optimally aligns at the intersection of luxury and innovation for an extraordinarily comfortable sleep.