100% PolyesterPackage Include- 1 Pair(2 Laces) of sneaker shoelaces.Shoe laces Specifications- Made from polyester fiber, soft and delicate. We provide 20 color of 7 size to chose: 28"(71cm), 36"(91cm), 40"(102cm), 45"(114cm), 48"(122cm), 54"(137cm), 63"(160cm),72"(182cm).Length Selection- Measure the length of your current shoe laces in inch or cm so you will get the length for the new shoe laces. Keeping in mind to add or subtract to your new laces if your old laces are too long or too short.Fit For Most Shoes- Double, texture, wear-resistant, tough. Great shoe strings for sneakers, sports shoes, running shoes, athletic shoes or boots.Satisfaction Guarantee- If you are not satisfied with these flat shoe strings, even you don't like the color, you are entitled to a refund; not only that, but also a heartfelt apology.