Comfort level: plush | Dual cooling action with phase changing material (PCM) | High-density gel memory foam for lumbar support; high-density body contouring support foam | Premium pressure-sensitive NanoCoil unit; individually wrapped coil pack | Stability support base | Hyper Cool luxury 4-way stretch knit cover for uniform comfort & durability | Adjustable base compatible | 10-year non-prorated warranty | Note: Purchasing mattress and foundation from two different brands may void warranty; see warranty for details | Foundation/box spring sold separately | Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening | State recycling fee may apply | Made in USA