Amplitude Tropical TitanThe Amplitude Series of fly lines features the revolutionary AST Plus slickness additive for the ultimate in slickness and durability. Each line is built with three textures for a reduction in friction, three colors to identify the separate parts of the line, and welded loops for quick and easy rigging. SA Amplitude lines are the culmination of decades of research, testing, and innovation; no finer fly line exists in the world. Amplitude is available