Enjoy a superbly luxurious sleep with Beautyrest's advanced Black Hybrid Lx-Class 13.5" Medium Mattress. Exclusive cooling technology provides a cool surface that helps to keep you comfortable as you fall asleep and stay asleep through the night. Multiple layers of Beautyrest's patented Aircool Memory Foam combine with Zoned T3 Pocketed Coil Technology to deliver superior comfort and exceptional support to create a first-class sleep experience that will leave you feeling invigorated to take on your day.