Good quality ready to wear garments will often have an invisible zip fitted. These zippers are often neglected by the home dressmaker which is a great pity because they can ensure success every time. Invisible zips are suitable for all fabrics from fine silk jersey through to suit weight wool's and tweeds, once fitted they will be virtually invisible and will merely look like part of the seam.The grooves on the underside of the foot allow the stitching to lie very close to the zipper coil, the secret to success. Fits all Janome and Elna Category B sewing machines.