Viper Biothane Working Lead 4 ftThe lead is also available in 20 inches, and 6 feet length. Our Biothane Working Lead is created from a high quality Biothane waterproof coated webbing. A trusted name in national sports leagues as well as international military and space organizations, Biothane has a flexible substrate core that is bonded with a durable waterproof coating for protection. It is durable, cleanable, and has proven durability in applications where safety, cleanability,