Scientific Anglers Mastery MPX Fly Line - WF4F, 5F, 6F Buckskin / Optic Green
WF4F Model # 120739. For years, the gold standard in the Scientific Anglers lineup was the GPX taper. Built a half-size heavy, the MPX taper starts where the GPX left off. The power is still there, only with an added bit of finesse.