For those longing for just the right balance of plushness and support this Euro top California king mattress is a top choice. Five different levels of high-density foamincluding plush pressure-relieving foam and gel memory foam for temperature regulationwork in concert to provide the ideal balance of comfort and support. Rest assured a power packed wrapped steel unit offers 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.