Elastic Color: Black 2 pairs UNIQUE LOCKING SYSTEM : The shoelace has a unique spiral structure, just put on the shoelace and tighten the screw lock, knot and tighten the screw lock. Once installed, continue to use, no need to worry about the shoelaces will be loose HIGH QUALITY SHOE LACES : Made from high-quality elastic rubber, it distributes pressure more evenly on your feet, providing comfort and support, aligning with your feet for customization STRETCH AND FIRM : Our elastic shoelaces conform to your foot for a custom cut. The laces no more loose again so you can perform your best! SIMPLE INSTALLATION : tieless shoe laces one size fits all, for Kids and Adults(toddlers,children,seniors,women and men), quick to install, easy to use.