Scientific Anglers Mastery Grand Slam Floating Fly Fishing Line - Tarpon. Bonefish. Permit. All in one day. All on one line. That’s the idea behind the Mastery Grand Slam, a fly line designed specifically to help you achieve one of angling’s most elusive accomplishments. With a short, powerful head the Grand Slam cuts through wind and turns over crabs, shrimp, and tarpon toads with ease. We’ve got the line. You just need the fish. Designed for demanding tropical saltwater applications Loads rods quickly, cuts through wind with ease, and turns over big saltwater flies Short, powerful head for quick casts to moving targets Overweighted by .75 sizes to load rods quickly; use designated line weight for your rod Overweighted to load rods quickly and efficiently Tropi-Core technology for tropical climates