Scientific Anglers Mastery MPX Fly Line Waterproof Zipper 10 magnetic storage compartments

10 magnetic storage compartments

Lightweight foam shoulder strap and back panel

Designed for trout and freshwater applications

Classic field-jacket design with a modern tailored fit

the Thunderhead Lumbar is built for your next big adventure

Scientific Anglers Mastery MPX Fly Line Waterproof Zipper 10 magnetic storage compartmentsThe Scientific Anglers Mastery MPX Fly Line is a versatile all around floating fly line built for anglers who want powerful turnover, smooth casting, and reliable performance across dry flies, nymphs, and streamers. Originally developed as the evolution of the legendary GPX taper, the MPX is built a half size heavy with added front end mass to help load modern fast action rods quickly while still maintaining refined presentation control. Its AST