This heavy stretch waistband elastic is stiff and strong. Use with heavier fabrics. Useful for cuff bands, waistbands and jacket waistbands. Made of 67-percent polyester and 33-percent rubber. It is machine washable and dryable in temperatures up to 200-degrees fahrenheit. Safe with chlorine bleach. Insert into casings or stitch directly to wrong side of fabric. Measures 1-1/2-Inch in size.