Prym fusible bonding yarn is ideal for hemming with invisible seams and can be processed with both the overlock and the sewing machine. The yarn goes into the lower gripper on overlock machines. - Yarn with adhesive properties - For hems with an invisible seam - To be processed using an overlock or sewing machine - Length 40m - Washable up to 40 degrees Using the thread and a wide zig zag stitch sew the raw cut edge of hems. Fold the hem inwards and then firmly iron from the outside. If a mistake should be made when ironing, the fusible bonding yarn can be loosened again once and ironed on again. The pack contains 40m of yarn and directions for use.