Add the pressure point relief of memory foam to the reliable support of a traditional spring mattress, and you have the revolutionary comfort of the hybrid mattress. A layer of memory foam is quilted in the soft, knit cover and placed over a 1.5 inch layer of comfort foam to create an incredibly comfortable sleep surface. The foam conforms to the unique curves of your body to minimize pressure points. Beneath the foam top, 6 inch steel coils offer the support and durability of a spring mattress. This design distributes body weight to contour and support as you sleep. This mattress is rolled and shipped in a box for convenient delivery and setup. Simply take the box to the proper room, Carefully remove packaging, and watch as the mattress expands to its true size.