Memory Foam firm Mattress 12 inch Premium-pressure relief and comfortComfort level: ultra plush Thick memory foam layer Super thick firm support foam Stretch knit cover Note: Purchasing mattress and foundation from two different brands may void warranty; see warranty for details 10 year non prorated warranty 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