Our USA factory produces AquaGuard® coil zipper, which is a water repellent zipper; back side of coil zipper is laminated with polyurethane (PU) film. Shiny and matte polyurethane coating on the reversed coil zipper enhance the appearance of your garments. The zipper can be RF welded or ultrasonically bonded or sewn. This item is heat durability, washing durability, and is good at operation at low temperatures.