Invisible zippers (sometimes called concealed zippers) are most often seen in the centre back of a dress, in the side or back of trousers and skirts, and in some home decorative projects. As the name implies, the zipper is hidden in a seam, becoming virtually invisible. This zipper application is often thought of as very difficult to do, however it’s really one of the easiest, especially when sewn with the Invisible Zipper foot.