BoomLaces "Laces With Power" for Men Women & Kids Poly-rayon/Nylon/Rubber/Plastic No tie shoe lace lock lacing system, perfect for everyone, durable and simple installation. BOOMLACES elastic shoelaces are 42" in length, stretching up to 70". One size fits all lace lock closure 3" wide No tie shoelaces provide comfort and support, improve performance with foot compression Lace locks give a secure custom fit, allowing elastic laces to eliminate pressure points Tighten or loosen the laces lock to create the custom fit for your foot compression preference Convenience, putting on shoes couldn't be easier or faster, slip on/slip off, quick, fast & easy For all lace up shoes with shoe strings, sneakers, work boots, etc. fits most shoe styles and sizes