Premium mattresses featuring the latest in cooling, comfort and support technology. Each of the Harmony Lux Carbon mattresses boasts Individually Wrapped Coils, with exclusive Dual Strand Coils in the middle for additional support where needed most. InfiniCool™ Lux gives you a cooler sleep surface and a cooler sleep experience. Comfort layers of Gel Memory Foam and RightTemp™ Wave Foam, which features ultra-strong, highly conductive carbon fibers, to deliver long lasting cooling comfort. These Premium Mattresses are affordable and will aid you in a great sleep. The Extra Firm Carbon Mattress is great for a stomach or back sleeper.