Comfort level: plush 3" high-density gel memory foam lumbar support 3" high-density cushion plush foam 3/4" high-density base foam 8" power packed wrapped coil system 900 individual power packed wrapped coils 10-year non-prorated warranty, CertiPur-US certified, adjustable base compatible Foundation/box spring available, sold separately State recycling fee may apply Note: Purchasing mattress and foundation from two different brands may void warranty; check warranty for details Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening