JM Gangster Invisible carbon leader line, designed with the newest formula, blends in better with the ocean environment, predatory fish are less alert by it, and it is stronger than other brands by 15%. After testing it again and again by JM Pony Liu, it is now the most recommended carbon leader line. When the fish are not biting, we highly recommend you use the Gangster Invisible carbon leader line because it is invisible! Invisible! Invisible!