When it comes to your comfort, discover the Chime 12-inch California king mattress. Its memory foam layer contours to your body, delivering amazing pressure relief to the body's major pressure points. This layer is supported by a thick layer of high-density support foam, which helps reduce motion transfer so you can enjoy an undisturbed night's sleep. This mattress arrives in a box for easy setup. Simply cut away the thick plastic wrap, unroll the mattress and watch it fully expand into place within minutes. Folding power base/box foundation available, sold separately.