Nite Ize KnotBone Stretch LaceLock System UV resistant, waterproof TPU laces Cut-to-fit laces fit most any shoe Laces allow footwear to dynamically adjust to your foot as it flexes and moves. Durable glass-filled nylon LaceLocks tighten and secure laces Includes: two 54" KnotBone Stretch Laces, two KnotBone LaceLocks, and two Lace Caps