Seam binding strengthens seams and prevents stretching. It is a quick way of finishing off edges. Features a woven edge and is washable. Sandwich the edge in between one piece of folded binding and sew in place to prevent the edge from unraveling or stretching. Made from 100% rayon. 9/16". You will get 5 yards of uncrinkled seam binding that can be used for your craft projects.