Medium Feel: The perfect balance between medium and firm; Great for stomach or back sleepers; This smooth top hybrid mattress is not compressed into a smaller box and is Assembled in the USA Support: Serta's 5 Zone Active Design combines five zones of coils and contouring memory foam to offer comfort and support where you need it most for full-body spinal alignment Pressure Relief: Serta's premium Perfect Conform memory foam is graphite-infused and designed not only to provide targeted pressure Cooling: 1” of graphite-infused memory foam and Cool Twist Gel memory foam with cooling gel swirled into premium memory foam offers enhanced airflow, heat dissipation, and contouring comfort Certified: All Serta Perfect Sleeper mattresses feature a 100 Night Trial, a 10-Year Limited Warranty, and CertiPUR-US certified foams free of harmful chemicals, so you can rest easy; Plus, all mattresses are compatible with adjustable bases Shipping/Manufacturing Note due to the high-quality manufacturing and substantial components contained within this mattress it cannot be compressed and is shipped ‘full-size’. Delivery Services availability and add-on costs determined by region. If Delivery services are available in your area you will be prompted to add them to your cart at checkout. Otherwise, Mattress will come standard with ‘door-drop-off’. If Delivery Services are not available in your region it is recommended you seek assistance/multiple persons to move due to the products heavy-bulky nature.