Features Elastic, no-lace shoelace, good elasticity, comfortable and firm. Easy to install, clean, waterproof and available in a variety of colors. 48 inches long, stretchable to 72 inches 120CM, suitable for all children and adults. Advantages: Lock the laces, save time on putting them on and taking them off, while protecting yourself from embarrassing situations and the danger of the laces coming off automatically. Tie your shoes once and never again. Use: Elastic lock laces, great for triathlon. It can also be used on boots, sneakers, work shoes, tennis shoes, loafers, cloth shoes, or any other shoes you have, etc. Quality: The spring buckle shoelaces are made of suitable elastic memory material, latex and polyester yarn and spring buckle. High elasticity, flexibility and humanized design, keep your feet loose and comfortable for a long time. SATISFACTION: 100% Satisfaction Guaranteed, our no-lace shoelaces can extend the life of a pair of lace-up shoes. We know that once you try them on in your shoes, you'll never use traditional laces again. You will love it.