100% PolyesterThe Package Includes -2 pairs of round laces (4 laces)Premium Shoelaces - Made from 100% polyester,woven by high-quality silk thread,wear-resistant and non-slip.Fashion all match - 4.5mm (Dots, High density), 4mm(Stripe, Low density) in diameter round laces for a variety of outdoor hiking mountaineering work boots, walking sneakers, sport shoes, when you need extraChoice of Size and Style - We provide 5 sizes and 6 style: 39/47/55/63/71 inches, it's better to measure your existing to find the best length.Satisfaction Guarantee - If you are not satisfied with these round shoelaces too short or long, even if you don't like the color, you are entitled to a refund or replacement.