Stretchrite 1-1/2-Inch by 25-Yard White Sport Knit Elastic Spool Knit sport elastic is an easy to use waistband elastic that is perfect for sportswear, casual clothes and even sleepwear. It is meant to be stitched directly to the inside of the garment so it is quick and easy to use. the four sewing channel guides make it easy to sew on. Each spool contains 25 yards of elastic that is black in color and is 1 1/2 inch wide 75 percent polyester, 25 percent rubber