This copolymer offers distinct advantages over other leader materials. Being a copolymer means that it is far softer than fluorocarbon or nylon monofilament, it is also thin, so that you can fish with confidence when using small dry flies or indeed nymphs. Being so thin and supple your flies will be able to behave more naturally. High abrasion resistance Superb strength to diameter Premium quality multipolymer Supple and thin