Get back to restful nights and refreshed mornings with this firm California king mattress. Its ideal for back and stomach sleepers who prefer a mattress that doesnt give too much yet still pampers with cradling comfort. Five different levels of high-density foamincluding a layer of gel memory foam for temperature regulationwork in concert to provide the ideal balance of comfort and support. Rest assured 720 power packed 15-gauge wrapped steel coils offer reinforced structural support where you need it most while 13-gauge wrapped coils provide edge support for a larger sleep surface and supportive sitting surface. Foundationbox spring available sold separately.