Enjoy endless possibilities for restful sleep with this 12-inch hybrid innerspring king mattress and foundation set. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. The mattress’ high-density foam provides the firmness you love, while the 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 with rounded corners for safety, it’s the last foundation you’ll ever need.