Rothco 40 Dress Shoe Lace Black 40 Inches Black-40Inches. Constructed with long-lasting polyamide (black laces are made with nylon) the tactical boot laces will perfectly replace your old military boot laces. Designed with heat-formed tips to prevent fraying the replacement boot laces will withstand the wear from any mission training or outdoor venture you embark on.' Specifications for Rothco 40 Dress Shoe Lace: Manufacturer: Rothco Age Group: Adults Length: 40 in Color: Black Fabric/Material: Nylon Gender: Unisex Features of Rothco 40 Dress Shoe Lace Material: Polyamide Material Specs: Polyamide (Black Laces Are Made Of Nylon) Weather: All Weather Package Contents: Rothco 40 Dress Shoe Lace Rothco 40 Dress Shoe Lace 6061