Amplitude Smooth Anadro/NymphFor Nymphing Big Rivers and Still Waters. Fast currents, tricky seams, and challenging drifts no problem. This line helps you connect with trout and salmon. We took our revolutionary AST Plus slickness additive and put it into the brand new Amplitude Smooth Series. These lines are smooth like traditional lines, but have increased durability and slickness due to the AST Plus, which is mixed directly into our coatings. Each line is built with three