Scientific Anglers Mastery Trout Fly LineThe Mastery Trout line is ideally suited for chasing browns, rainbows, cutthroats, and any other trout you can imagine. Perfect for dry flies and ideal for smaller nymphs and streamers, the Mastery Trout is one of our mainstays and has helped anglers catch trout from the mountains of Germany to the Mountains of Colorado Revised compound taper for delicate deliveries Excels in short to medium distances with dry flies and smaller nymphs and streamers