Nathan Lock LaceAdd security to your exercise, workout, or run with the Nathan Lock Laces. These laces are designed to stay locked and secure during lengthy or intense activities. Stretch-fit allows you to get a comfortable fit while maintaining peace of mind as they stay in place. These water-resistant laces make your running shoes easy to slip on, while helping your feet stay dry. 48" in length. Sold as pair. One Size Fits Most.