Enjoy endless possibilities for restful sleep with the Ashley Sleep Essentials 12-Inch King Medium Hybrid Mattress in a Box. You get the best of both worlds: the pressure relief of cooling gel-infused memory foam, coupled with body-contouring wrapped coils for superior support. Rest assured that high-density quilt foam provides the comforting feel you love. Plus, this mattress arrives in a box for quick, easy setup. Just cut away the plastic wrap and unroll it.