Sleep Master 12-Inch Pressure Relief Memory Foam Mattress and Platform Metal Bed FrameMattressbr Mattress layers include 3 memory foam 3 lbs density 3 super soft foam with pressure relief system and 6 high density foam base br Steel bed frame eliminates need for a box spring br The mattress is shipped in a small box and can take up to 48 hours to fully expand from its compressed state br CertiPUR-US Certified br Limited 5 year warranty br Sleep Master 12-Inch Pressure Relief Memory Foam Mattress and Platform Metal Bed FrameMattressbr