1. Material: spandex high elastic yarn 2. The tight weaving process ensures that the stretching angle between the wires is not deformed 3. Increase the characteristic firm mechanism, rest assured that the color will not fade after washing 4. High transparent shoelace head, easy to pass through the shoelace hole 5. Applicable crowd: children, elderly, adults 6. Length: 100cm, can be stretched to 150-170cm

http://olla.gr/10-pcs-stretch-spandex-non-binding-elastic-shoe-laces-purple/