The COSTUMAKERS Activewear One Way Separating Zipper 55 cm (22 in.) in Rail is a medium-weight #5 nylon coil zipper for jackets, vests, and activewear. Its one-way separating design allows the garment to open fully from the bottom. Install with a zipper foot after stabilizing and aligning the zipper area, and follow the garment fabric’s care instructions.