Patent ID: 7191483

Claim:
A composite foam mattress assembly, comprising: a foam core having two to three layers of stacked foam sheets contained within a mattress cover having an underside and sidewalls extending upward from the underside a height approximately equal to the height of the stacked foam sheets, said sidewalls having a first side of a first zipper assembly attached to an upper peripheral edge; and an overlay cover including fabric sidewalls, a fabric bottom sheet, attached at peripheral edges to said fabric sidewalls extending upward from said bottom sheet, a fabric cover attachable by a second zipper assembly to a peripheral upper edges of said fabric sidewalls, said fabric bottom sheet and said fabric sidewalls defining a foam cavity, at least one foam sheet disposed within said foam cavity, and a second side of said first zipper assembly attached to a peripheral edges of said fabric sidewalls proximate the attachment to said fabric bottom sheet, said second side of said first zipper assembly allowing said overlay cover to be attached to said mattress cover.