This patented “elastic lacing system” features specially designed laces combined with a spring-activated locking device. Great for running, triathlon, sports and casual wear. Also ideal for children, the elderly and the physically challenged. May be worn with all styles of running/athletic shoes and casual lace-up shoes. Curved tips of laces make them easier to use with the complex eyelet configurations of today’s athletic shoes. Lock Laces allow the user to simply slip shoes on and off. No more tying and untying laces or making double knots. In addition to convenience, the laces offer superior comfort, more flexibility and a better fit than cotton or nylon shoelaces. Water-resistant.