Quantity: 3 Pairs. Diameter: 5mm thick. Condition: All New Brand. Color: Black/Gray. Size: 39 (100cm) 48 (120cm) 54 (140cm) 60 (153cm) 63 (160cm) 72 (183cm). Material: Polyester. Style: Reinforced braided from polyester with a polyester core. Round laces for outdoor hiking walking and work boots shoes. These Round Shoelaces with Elastic and Strong. It is not easy to loose while running and all Kinds of sports. They are reinforced with two inner nylon cords and an outer polyester weave. This makes them extra durable while also allowing for a strong knot that stays tied. Perfect for boots work boots & hiking shoes they also work great for other shoes when you just want extra strong and & sturdy laces.