Choose the Extreme+ when a line that’s too supple lacks the stiffness needed to present or retrieve the fly properly. Its fluorocarbon coating and superior stiffness provide crisper performance on bulky rigs. Thinner diameters are suitable for discreet fishing, while thicker lines provide more reserve for large flies and powerful fish. The spools snap together and swivel to easily organize multiple line sizes. Your choice should be based on fly size, the level of stealth required, and the expected strength needed during the fight.