Backed by a dry adhesive film that is activated by heat, HeatnBond interfacing forms a no-sew bond three times stronger than other traditional fusible web without adding weight or stiffness. Light weight is perfect for dresses and blouses made of sheer or lightweight fabrics. With a low temperature and short pressing time, it allows for a wider range of materials to be bonded. There is no steam or pressing cloth needed, and it will not lift or pucker after washing. Machine washable, dry cleanable. 100% Polyester.