Premium mattresses featuring the latest in cooling, comfort and support technology. Each of the Harmony Lux Diamond mattresses boasts Individually Wrapped Coils, with exclusive Dual Strand Coils, with additional support in the middle where support is needed most. InfiniCool™ Lux gives you a cooler sleep surface and a cooler sleep experience. SurfaceTouch™ Gel Memory Foam, located directly under the sleep surface, gives you immediate pressure relief. Comfort layers including RightTemp™ Wave Foam, which features ultra-strong, highly conductive carbon fibers, to deliver long lasting cooling comfort by pulling heat away from your body. The signature feature of these mattresses is the Micro Diamond™ Memory Foam, which is both highly conductive for additional heat removal yet its fast response gives you instant comfort. These Premium Mattresses are affordable and will aid you in a great sleep. The Diamond Medium Firm Mattress is good for a back or Side sleeper.