Comfort level: firm High-density convoluted foam High-density cushion firm foam Support pad for stability Power-packed wrapped coil unit with Ashley Edge to minimize motion transfer and increase support 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