The Heavenly is a state-of-the-art Hybrid mattress. Featuring a Maximum Cooling Cover with Phase Change Technology, multiple layers of high-quality Cool Gel Memory Foam, as well as a layer of special, extremely breathable Serene Foam, the Heavenly offers high-tech cooling and comfort. For support, the Heavenly offers an individually-pocketed coil unit for motion separation and support, as well as Restonic’s famous Marvelous Middle: which features 25% thicker coils in the center-third of the mattress for extra center support where you need it most. Additionally, the Heavenly features a high-density Foam Encasement for a larger sleeping surface, and lasting edge-to-edge support.