Beautyrest Convoluted Foam Mattress Topper, Size King (FMB945OS) Type: Foam Materials: Polyurethane Foam Get added comfort while you sleep with a 1-inch foam mattress topper Bedding accessory has a cut-zoned convoluted design Mattress pad is a great addition to any bedding ensemble Economical mattress topper King measure 74 inches x 75 inches