The Waterproof Picnic Quilt Pattern is absolutely ingenious. Designed with an added a layer of polyurethane (commonly used in diapers) between the backing and batting, acting as a moisture barrier preventing your picnic quilt from getting wet. There are also instructions for an optional pocket for holding essential items. The Waterproof Picnic Quilt can be folded and strapped in place with the optional strap, making it perfect for on-the-go!