ElasticStretchCompatibility: Perfectly replacement shoe laces, the same size and quality as the standard version, which will make your shoe laces brand new again. Please make sure to measure your original shoe laces length before purchasing.2 Pairs in a Pack:2 pairs stretch black shoe laces (4 Laces) and an easy-to-follow installation manual,1/10" (2.5mm) wide, 24inch length. Install the shoe strings do not need any other tools or cutting the laces.No Tie Shoe Lces:Put on shoelaces and tie knots, never worry about tying your shoes again during any activity. Slip on/Slip off, elastic shoe strings are quick and easy. we know that once you try shoe laces tieless, you'll never go back to traditional shoestrings.Premium Material:No tie shoelace, is made of high elastic rubber, which is firm and not easy to break, slips the foot into the sneakers with ease, ensuring the sneakers wraps around the instep with just the right amount of force,so they can be used for high intensity sports and can meet the needs of sports for a long time.After-sale Service:We are so confident in our replacement shoestrings that we will replace them for free if they would ever break!