Medium Feel: Experience consistent, comfortable support with the BeautySleep 12” Medium Hybrid Mattress; great for sleepers who want an even balance of pressure-relieving comfort and support with a responsive mattress surface. Assembled in the USA Hybrid Mattress in a Box: Compressed, rolled, and conveniently shipped in a box; Simply unbox, unroll and unwrap it on a supportive bed frame or foundation, and allow it to expand for 72 hours to experience its consistent, comfortable support Cool: The layer of body-contouring AllCool Gel Memory Foam provides pressure relief, while the high-density AirCool Foam promotes airflow for a cool, comfortable sleep Supportive: Individually-wrapped Original Beautyrest Pocketed Coil Technology provides consistent, comfortable support Certified: All BeautySleep mattresses feature a 100 Night Trial, a 10-Year Limited Warranty, and CertiPUR-US certified foams, certified free of harmful chemicals, so you can rest easy; Plus, all mattresses are compatible with adjustable bases