The Cose Nylon Invisible Zipper, 22cm long and in navy blue, is a pre-assembled zipper with a slider included. Its teeth are hidden behind the tape after application, leaving only a discreet stitching line visible. It's the most commonly used type of zipper in dresses, skirts, and blouses for more elegant garments, where a clean finish without the zipper being visible is desired. The navy blue tone is an elegant and discreet color, often used in more formal dresses and skirts. The 22cm length is suitable for skirts and dresses with short openings, generally applied to the side or back of the garment. It requires a specific invisible zipper foot on the sewing machine, which allows for correct application along the hidden teeth.