Scientific Anglers Mastery Trout is designed for precise and delicate dry fly presentations for trout. This line makes smooth presentations to wary trout at medium-to-long distances a breeze, even on the most challenging days. If youre an avid trout angler or a dry fly fanatic, this is one of the best trout-specific lines on the market. Beyond dry flies, however, this line can also be used with small nymphs and smaller streamers. Its a highly versatile freshwater line and the affordable little brother to the Amplitude Trout and the Amplitude Smooth Trout. This is a line (and a taper) that has been around for a long time, and its performance has been proven in a variety of scenarios.