Lock Laces go with any shoe or outfit combination. Tiny “tracers” line the laces, adding style, character and dimension. One-size-fits-all for kids and adults. Each pair of no tie shoelaces contains 2 48” elastic laces, 2 lock devices and 2 cord clips and is suitable for lacing up one pair of shoes. The RK PRO laces are thinner than the original Lock Laces, allowing for easier installation into popular trail running shoes. The lock has been upgraded and strengthened to ensure that the laces remain secure in all conditions.