DescriptionLace-free lacing system: turn any pair of lace-up tennis shoes into a trainer.Stretch fit comfort: our elastic laces fit your foot for a custom fit. Increased compression reduces discomfort, so you can perform at your best6 strands of fibres measuring 0.22 cm in diameter and 48 inches in length, stretchable to 72 inchesFits everyone: Lock Laces, originally designed for triathletes to reduce transition time, are a great gift for seniors with arthritis or other disabilities, children with autism, runners of all ages and casual usersEasy to fit: one size fits all (children and adults), quick and easy to fit. Each pair is suitable for lacing up a pair of shoes. Easy to follow installation instructions and video provided.100% SATISFACTION GUARANTEE: A pair of lace-up tennis shoes is guaranteed to last. We know that once you try the shoe on, you will never go back to traditional laces