Scientific Anglers Amplitude Textured Trout Fly LineScientific Anglers Amplitude Trout Fly Line, The first series of lines to feature the revolutionary AST PLUS slickness additive, the Amplitude will shoot farther and last longer than any other line on the market. Its slickness down to a science. Fly fishing for trout has never been so smooth, especially with a triple textured line. Featuring our unparalleled AST Plus slickness additive, the Amplitude Trout is slicker than any trout taper weve ever