Moovintens Zippy Elastic shoe laces with lock system - Elastic No Tie Shoelaces - Perfect For Running, Triathlon And Many Other Sports. Ideal For Kids PERFECT for running, triathlon, crossfit, basketball, tennis, golf, soccer and many other sports like. FIT with all types of shoes : Zippy elastic laces are 39 inches in lenght and stretch up to 42 inches. TRANSFORM YOUR SHOES into a no-tie slip-on : Zippy makes putting your shoes on quick and easy. IMPROVE THE COMFORT of your shoes: Elastic cords improve your confort and the support of your shoes INCREASE SAFETY : The lock system eliminates the risk of untied shoelaces. No more loose or untied shoelaces when you're doing activies.