Scientific Anglers Mastery Series MPX Fly Line
Mastery Series General Presentation Line
Features of the Mastery MPX Fly Line:
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The ultimate general presentation line
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Improved version of the GPX taper
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Built a half-size heavy to load rods and turn over large flies easily
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Excellent with dry flies, nymphs, and streamers
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Features the ST+ slickness additive
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For use in moderate and cold climates
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Braided multifilament core
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SA MS MPX WF X F (X = line weight)
SCIENTIFIC ANGLERS LINE IDENTIFICATION (SA•ID)
SA brings you SA ID. SA ID is an innovative line marking system allowing you to identify your lines at a glance. Wonder if a shooting head is 200 grain or a 300? Just look at the SA ID.
ADVANCED SHOOTING TECHNOLOGY
Scientific Anglers’ patented dry-slick technology provides continual line slickness, allowing the line to shoot farther as it moves through the guides. Lines with AST easily shed dirt, algae, and other parasitic drag particles, allowing lines to cast farther, float higher, and stay cleaner than traditional lines.
WELDED LOOPS
Exceptionally slick and strong, welded Streamlined Loops produce smoother casts and easier turnover with a seamless fly-line-to-loop transition making for softer landings and cleaner pickups.






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- Questions
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- line
- redington path
- Sage Sonic
- guys
- casting
- flies
- recommendation
- trout streamers
- loads
- taper

MPX for Sage Sonic
Awesome. I called these guys and asked for a recommendation of lines that would load properly.This is a great line for the Sage Sonic. Loads the rod nicely.

Smooth casting fly line
Mpx fly line cast smoothly and loads my redington path ii rod nicely!

Smooth casting line
Smooth casting and easy loading fly line feels amazing on my 4wt redington path ii

My go to summer line
Great for turning over decent size flies with repetitive 50 ft casts. Floats great too.

Great Fly Line & Price!
Excellent purchase. Appreciated having the fly line put on my reel.

Great Line
Enjoyed my purchase from Stillwater.

Great performance
Great line for throwing trout streamers and dry-dropper rigs on a 6wt.

Excellent line.
This line is heavy enough to turn over small weighted flies, but has enough taper for soft presentations.

Great line for a fast action rod!
My go to line for hopped droppers on the Yakima River, WA. No complaints other than I wish is was a little more durable.

Great line
This line is very smooth and casts so easily through the guides. High floating and easy to see.
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- Reviews
- Questions
Thank you for posting a question!
Your question will appear on the site once we've answered it.
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!
- line
- redington path
- Sage Sonic
- guys
- casting
- flies
- recommendation
- trout streamers
- loads
- taper

MPX for Sage Sonic
Awesome. I called these guys and asked for a recommendation of lines that would load properly.This is a great line for the Sage Sonic. Loads the rod nicely.

Smooth casting fly line
Mpx fly line cast smoothly and loads my redington path ii rod nicely!

Smooth casting line
Smooth casting and easy loading fly line feels amazing on my 4wt redington path ii

My go to summer line
Great for turning over decent size flies with repetitive 50 ft casts. Floats great too.

Great Fly Line & Price!
Excellent purchase. Appreciated having the fly line put on my reel.

Great Line
Enjoyed my purchase from Stillwater.

Great performance
Great line for throwing trout streamers and dry-dropper rigs on a 6wt.

Excellent line.
This line is heavy enough to turn over small weighted flies, but has enough taper for soft presentations.

Great line for a fast action rod!
My go to line for hopped droppers on the Yakima River, WA. No complaints other than I wish is was a little more durable.

Great line
This line is very smooth and casts so easily through the guides. High floating and easy to see.