Only the best materials are used in the Gold Bond 605 mattress. Gold Bond uses densely packed cotton allowing for the mattress to maintain its firmness and support, as well as it's thickness. Adding a layer of solid 2" foam at the futons core provides additional suppleness and resiliency. Gold Bond crowns each futon across the middle with several pounds of extra cotton top and bottom (the best way to make any mattress) for extra comfort and support.