This hybrid king mattress and king mattress foundation set is simply a better way to get a great night’s sleep. The hybrid mattress gives the contouring support of a traditional coil mattress and the firmness of gel memory foam that provides restorative support for your lower back. The riser is an all-in-one support system that takes the place of an ordinary bed frame and box spring. And setup is as easy as 1-2-3. Step one: follow the riser’s quick and easy “no tools” assembly instructions. Step two: remove the mattress from the box and unroll. You’ll be amazed at how it fully expands within minutes. Step three: enjoy a great night’s sleep.