Winner IFTD 2019! Scientific Anglers Amplitude Smooth Infinity Fly Line for ALL Freshwater Species.

The Amplitude Smooth Series adds revolutionary AST Plus slickness to provide increased durability and slickness like a smooth traditional line. The AST Plus is mixed directly into the coating. Each line is built with three colors to identify for quick and easy rigging. SA Amplitude Smooth lines are simply the finest smooth fly lines in the world and are available in a number of freshwater and saltwater specific tapers.