Scientific Anglers Mastery Saltwater is a general purpose fly fishing line designed to be the go-to everyday line. The line features a versatile compound design provides enough power to cut through the wind, while retaining a delicate delivery for spooky fish on the flats. Built for a wide range of temperatures and environments. The Scientific Anglers Mastery Saltwater line is for the angler looking for all round performance. Features  Compound taper turns over big flies Designed for use in temperate and tropical climates Two tone for better visibility Variable head lengths for distance casting and quick shots to passing fish Small diameter to deal with windy conditions Compound taper turns over big flies Tropi-Core technology for tropical climates, although, designed to handle milder temperatures