With the Hybrid 1200 king mattress and foundation set, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the firmness you love. Gel memory foam provides restorative support for your lower back. The included foundation is designed to cater to your busy lifestyle and built to last. It’s ready to assemble in the comfort of your home. Constructed with a sturdy metal frame and rounded corners for safety, it’s the last foundation you’ll ever need.