This elastic has an improved quality over other brands that can be visually seen and experienced Made from 100 polyurethane. Thin soft lightweight. Will stretch 3 to 4 times its original length. Chlorine safe, dry cleanable. Use for stitched on or topstich applications in swimwear, aerobic wear lightweight fabrics. Can also be used to stabilize seams in knitknit wear garments. Size: 38" 9.5mm. 5 yard package. 4 packages per box. Purchase by the box. First Available June 2010.