The Aspen Collection, features a mattress built to support and cushion you while keeping the heat down. Supported with Individually Wrapped Coils with a Quantum Edge, meaning adapting support with a firm edge for greater support and mattress surface use. Layers of comfortable foam including 5 Zone Convoluted Serene™ Foam, which molds to your body, relieving pressure and cushioning areas which need it most. A Cooling Gel Quilt keeps the heat away and lets you get into the deep sleep your body desires. This mattress is a great mattress for a side sleeper.