General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding One 2" layer of Memory Foam on top followed by a 8" layer of high density foam, the Memory Foam molds to the body's natural shape Relieves pressure points, distributes body weight and eliminates motion transfer