The Hybrid 1200 king mattress and base set includes a 12-inch mattress and a power base with adjustable head, a combination that gives you endless possibilities for restful sleep. Feel the support of a traditional coil mattress as it contours comfortably to your body. High-density foam provides the firmness you love. The adjustable base smoothly raises your upper body so you can sit up in bed or sleep in a partially inclined position (helpful for people who snore or experience acid reflux). Convenient USB charging is available in the remote control for connecting electronic devices. Plus, this mattress arrives in a box for quick, easy setup. Just remove the plastic wrap and unroll.