This hybrid mattress is a combination of memory gel and spring coils; a blend of comfort and support. Quad Coil technology provides strong and stable support which is paired with cool reflections gel which provides soft comfort and works to reduce heat, keeping you cool during sleep. The quad coil support is composed of individual pocketed springs which enable each coil to individually conform to your body, providing greater support and pressure relief. Foam encased edge support allows for equal comfort throughout the entire mattress; even near the edge of the bed. Foundation Not Included The Europa Queen Hybrid Mattress with Cool Reflections Gel and Quad Coil Technology by Corsicana