Elastic Thread 30yd-White 3-Pack - Better value - Better Price (3 x 30yds each) Perfect for creating gathers shirring and smocking in all kinds of garments and home decor as well as extra support for knit and crocheted ribbing for socks sweaters and much more Made of 28 percent polyester and 72 percent rubber Machine washable/dryable in temperatures up to 200 degrees fahrenheit