The nathan lock lace is an asset to any shoe preventing laces coming undone and making getting your footwear on and off as easy as possible whether yoursquore hiking biking or running this nathan accessory is easily applied in a one time set up and keeps laces locked and secure throughout your entire pursuit the lock lace is performance inspired and features a durable elastic construction with a clever mechanism that simply dials you in to the perfect fit the nathan lock lace is locked