With slightly longer front and rear tapers and a 1/4-size heavier weight scheme, Scientific Anglers Mastery Trout GP Fly Line functions nicely as a general-purpose trout line, with a nod to finesse presentations. It's a great choice for anglers who tend to shy away from heavier rigs such as larger streamers or bulky indicators. Features the revolutionary AST Plus slickness additive for superior shooting ability. Braided multifilament core, SA Line ID, and welded loops. For general purpose use in cold/medium water temps. AST Plus slickness additive for superior shooting Slightly longer front and rear tapers 1/4-size heavier weight scheme Braided multifilament core Improved Dry Tip SA Line ID and welded loops