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Sets the standard for fly lines around the world.

Designed for cold to temperate water, the Scientific Mastery GPX Fly Line is the ideal all-purpose fly line. Thanks to its taper design, the Mastery GPX handles a large range of flies and conditions with ease. This killer line also provides excellent versatility for presenting nymphs, dries, and streamers.
  • Advanced Shooting Technology (AST) sheds dirt, algae, and other particles for farther casting, better flotation, and friction-free movement
  • Dry Tip Technology (unique 3M Microballoon formulation) enhances flotation along the tip
  • Scientific Anglers Line Identification (SA-ID) allows you to identify your lines at a glance
  • Welded streamlined loops allow for quick rigging
  • Braided multifilament core provides low stiffness and moderate delivery
  • Built a half-size heavy for use with fast-action rods
  • Low memory core handles dries and terrestrials with ease
  • If you're buying a reel or spool and fly line, we'll be happy to rig it up for you, please give us a call at (855)-712-0513 for details

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Here's what others have to say...

4 5

So far so good

I used this on my 5wt Z-axis rod last year and it was just okay. It did what I needed it to, but after having tried Rio Gold, I won't be going back to SA. This line seems to be a lot stiffer and really noisy compared to others that I've used. It does what it needs to, but that's about it.

4 5

Great All Around Line

For your faster action rods when you wanna have one floating line for dries, nymphs and the occasional streamer this is a great choice. I'm a fan. I like the SA GPX Sharkskin even better though! As always consult your local fly shop and they will let you know if this is a fly line with the taper that best fits your rod and fishing preference. Support your local shop!