Get back to restful nights and refreshed mornings with this firm 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 highdensity 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 15gauge wrapped steel coils offer reinforced structural support where you need it most while 13gauge wrapped coils provide edge support for a larger sleep surface and supportive sitting surface Foundationbox spring available sold separately