Enjoy endless possibilities for restful sleep with our Retreat King Mattress in a Box. A hybrid innerspring mattress, Retreat provides the pressure relief of cooling gel-infused memory foam paired with body-contouring pocketed coils for superior support. High density quilt foam provides the comforting feel you want and need. And have we mentioned this mattress is a bed in a box with quick and easy setup? Simply bring it to your room, cut away the plastic wrap, and unroll. You’ll be amazed at how it fully expands within minutes. Foundation and box spring are sold separately.