Timberland Cord Replacement Laces Strong 5/16" 4mm Shoes/Hiking/Walking/Work Boots Genuine Timberland replacement laces. Crafted from a rugged blend of cotton and polyester that's designed for long-lasting performance, these laces are idea for hikers and work perfectly for any shoe or boot with up to six eyelets. 79% polyester, 21% cotton for long-lasting wear. Available colours: Black or Brown. Available sizes: 36" 91.5cm, 44" 112cm or 54" 138cm. Fits boots and shoes with up to 6 x 2 eyelets.