Seamlessly integrating luxury and technology for an indulgent sleep experience, the Beautyrest Black L-Class Extra Firm balances a dense feel with the comfort you expect in a luxury mattress. Exclusive to Beautyrest Black, T3 Pocketed Coil Technology elevates the design and performance of Beautyrest's legendary support. Three steel strands wound into one coil absorb energy, reduce motion and provide exceptional resilience for support, durability and undisturbed sleep. Found only in Beautyrest Black, BlackICE 4.0 Technology harnesses four cooling actions in an advanced temperature management system, helping you feel cooler and sleep better. Compatible with motion power bases, this mattress makes for the ultimate sleep experience. 10 Year Limited Warranty