Sunline Assassin FC Fluorocarbon Line features patented Pion Technology. Assassin is the first product launched in the US featuring Pion Technology. Pion processing improves slickness, abrasion resistance and longevity of your line by chemically altering the line's surface to allow resin processing to bond at a molecular level. This processing increases line performance and allows the line to retain key characteristics longer.FeaturesPion Treatment increases slickness and line life, while decreasing abrasionClear100% Fluorocarbon