The 4-Sided Vinyl Changing table pad is made with our Bundle Fiber Core, 3-ply vinyl and is waterproof to protect pad from accidents. No foam or polyurethane. 4 rectangular raised sides with 2-inch full perimeter protection keeps your little one comfy during diaper changes. Quick release buckles with infant safety belt and safety screws for the changing tray ensures that your baby stays safe at all times.