Good-quality ready-to-wear garments often have an invisible zipper. These zippers are often neglected by home dressmakers, which is a pity, because the Concealed Zipper foot can ensure success every time. Invisible zippers are suitable for all fabrics from fine silk jersey through to suit-weight wools and tweeds. The key is to get the needle as close to the fastener as possible, which this foot accomplishes by slightly unrolling the zipper just before the needle. Once fitted, a well-sewn invisible zipper will merely look like part of the seam.