GGT Tiger Unisex Dress Shoes Shoelaces Rubber Elastic Flat 1 Pair (4 types) Shoelaces' outer part is made with fabric, but the inside is rubber. Putting on and taking off your shoes will become as easy and comfortable as breathing. These shoelaces are so bonded that once you tie your shoelaces, it will not easily be untied. Thickness is 3.2mm, which is the most frequently used shoelaces for dress shoes. You do not need a shoe lift to wear dress shoes.