Never Have to Tie Again - Get stuck by loosened shoelaces? Not again! Keep up with the competition or enjoy your trip uninterrupted with these shoelaces -- the locking system hold laces together so they won't come undone anymore Slip on Slip off - These black elastic shoe laces are expandable for you to slide your foot in and out. Wearing shoes takes much less time and energy. The button also allow for quick adjustment of tension, so runners can speed up their transition in triathlon, hiking, running, tennis or other exercises Also Good for Daily Use - These laces transform your sneakers into a pair of slip-on. The no tie benefit make them ideal gifts for seniors or kids having trouble tying their shoes, and any adults who just want life easier. You are in the right place! Upgrade Your Wearing Experience With high grade elastic rubber and strong lock, these lacing strings look great and perform powerfully. Get these elastic shoelaces, and you will add slip-on, quick-tie and perfect-fit experience to your shoes, a total upgrade worthing trying. Who are these shoelaces for? 1. Sports enthusiasts: occasional joggers, runners, gym goers, committed marathon and triathlon athletes 2. Anyone who finds conventional laces a challenge: kids who take age to lace shoes before school, or the elderly who hate having to bend to tie shoes FAQ 1. What if I don’t like the color? 2. Is it hard to Install? It is simple. Every pack comes with instruction and there is video in this page. 3. Can I reopen the clip? Yes, you can. First insert a small flat head / minus screwdriver to the groove at the bottom of the clip, rotate the screwdriver a bit and the clip opens. 4. Are these long enough for boots? They are 120cm long and will fit most ankle-top boots. 5. How thick are these laces? They are 3.0mm thick and should fit most shoes, but please have a check if your shoes have small eyelets.