Q. What is an invisible zipper?

Answer

To avoid being seen, an invisible zipper is sewn into the seam. A thin zipper pull at the top is the only visible part. Invisible zippers are made in a way that is invisible to the naked eye. An invisible zipper eliminates the need for topstitching by allowing the zipper to be inserted prior to the seam it will be sewn into. In 1917, Swedish-American engineer Gideon Sundback received a patent for the first modern zip fastener and the machine to produce them. Buttons and hook-and-eye closures were the norms for garments before the advent of zippers.