Lock Laces. Lock Laces are a patented elastic lacing system for athletes. Never worry about tying and untying your laces again thanks to and easy-to-use cord lock! Makes it easy to slip shoes on and off. Custom fit thanks to elasticity and cord lock. Lock Laces provide stretch-fit comfort and locked-in safety. One size fits all. 48" inches long but stretch to 72". Made from the same material as bungee cords, Lock Laces wont break, dry rot, or loose elasticity. Special fiber repels water. Lock Laces are convenient, comfortable and flexible!