No-tie Lacing System: Turn any pair of lace-up tennis shoes into slip on sneakers. Lock Laces are the original, no tie shoelaces with over 8 million pairs sold worldwide Stretch Fit Comfort: Our elastic laces conform to your foot for a custom fit. Added compression reduces discomfort so you can perform your best! Perfect For Everyone: Lock Laces, originally designed for triathletes to decrease transition time, are a great gift for seniors suffering from arthritis or other disabilities, autistic children, runners of all ages, and casual users! Simple Installation: One size fits all (kids and adults), quick to install, and easy to use. Each pair is suitable for lacing up one pair of shoes.