The combination of polyester fabric and polypropylene fiber rubber, make our flat elastic cord a great bet for your face mask making needs. Breathable and machine-washable, the vibrant colors available are consistent and colorfast, and the elastic is packaged on a spool for convenient storage. So easy to work with, in addition to face masks this elastic is great for waistbands, hair ties, belts, shoelaces, fitted sheets, crib covers, or sofa slipcovers. Heat-fusible with minimal fraying, this flat elastic band is stretchy and will not loosen over time. Durable and flexible, it is easy to cut and tie this elastic, and there are 50 yards on each roll. Our flat elastic comes in 1/8 of an inch, ¼ of an inch, 3/8ths of an inch, and ½ of an inch.