If you’re looking to hide your Invisible Identical Zippers (IIZ) came as an option to those that wanted a clean finish to the sportswear and outdoor apparel. It’s not a “true” invisible zipper, so you cannot sew all the way to the teeth, however you get an invisible look. Also known in the industry as a “reverse coil” the IIZ zipper will give you a clean, sleek look to your pieces.