The Scientific Anglers - Mastery GPX Taper is the ultimate all-purpose fly line - now with Dry Tip Technology for the ultimate floating fly line experience. The line is made a half-size heavier to better load today's fast-action graphite rods and deliver terrestrials, nymphs, and other bigger, heavier trout flies. The fly line has a welded streamlined loop - slick and strong - for easy connections and seamless fishing.