Viper Biothane 10' Long Lines (Brass Hardware)The Viper Biothane 10' Lead is created from a high quality Biothane waterproof coated webbing. 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, flexibility, and strength are crucial. This robust webbed dog lead is specially coated to emerge from even the swampiest environments, dry and smell free,