Heavy Duty Leather Cougar Laces. 72", 90" or 108" long Size: 9/64" x 8-9 oz. or 3.4mm x 3.6mm. Meets NFPA 1977 standards for protective clothing & equipment for wild land firefighting. Used by Firemen, Loggers, Welders, Farmers, Ranchers, Mechanics, Industrial Workers, Miners, Fabricators, Truck Drivers, Etc. Thank You for your interest!!