Comfort level: firm 2" high-density gel memory foam lumbar support 2" high-density cushion firm foam 0.75" high-density base foam 8" power packed wrapped coil system 823 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 Mattress ships in a box; please allow 48 hours for your mattress to fully expand after opening Note: Purchasing mattress and foundation from two different brands may void warranty; check warranty for details