what is the difference between an invisible zipper and a regular zipper?
An invisible zipper is a zipper with very fine teeth. It's sewn into a garment in such a way that it makes the zipper invisible, hidden in a seam. ... Unlike a regular zipper, when sewing in an invisible zipper, the seam is sewn after the invisible zipper is sewn. Refer to the directions before sewing the zipper area.