Shopping for Scientific Anglers fly lines? Start here, with this list of our experts' top recommendations. And if you're looking for a more personalized recommendation to ensure that you find the perfect fly line for you, be sure to chat with a Fly Fishing expert.
- Scientific Anglers Mastery MPX Fly Line
- Scientific Anglers Mastery Trout Standard Fly Line
- Scientific Anglers Frequency Trout Fly Line
- Scientific Anglers Amplitude Smooth Infinity Fly Line
- Scientific Anglers Amplitude Smooth Trout Freshwater Fly Line
- Scientific Anglers Amplitude Textured Trout Fly Line
- Scientific Anglers Mastery Bass Bug Fly Line
- Scientific Anglers Amplitude MPX Fly Line
- Scientific Anglers Mastery Infinity Fly Line
- Scientific Angler Amplitude Smooth Infinity Salt Fly Line
Scientific Anglers Mastery MPX Fly Line
This is a great all-around line. It is also a great line that holds up for several years. Lines last if taken care of, this one is a great investment! Just like out of the box even after two years for me!

Casting smoothly at all distances, and mending at any range. S.A. lines are very durable, and you can expect it to last for years if taken care of.

Perfect for loading a fast rod and rolling out heavier nymphs and streams.













Scientific Anglers Mastery Trout Standard Fly Line
Great general-purpose line for rivers and lakes. Good for casting feel, distance, accuracy, and presentations.

Floating line, pairs well with 3 WT reel. A go-to for trout fishing, smooth casting, and mending.

Great all around fly line! Mends and is easy to cast. Good for dry fly, nymphs, and streamers.

Scientific Anglers Frequency Trout Fly Line
The Frequency series is a great option for newer anglers who don't want to break the bank on a fly line. A great all-around taper with a medium-length head that will help you cast those small dries for delicate presentations. The line also will excel fishing nymphs.

5wt floating line. Great for trout, bass, top water, dry flies, streamers, and nymphing.

Freshwater, floating line..good for dry fly fishing, nymphing, and streamers

Scientific Anglers Amplitude Smooth Infinity Fly Line
Just about everything! This line is coated with a low-friction, high-float treatment providing easier casting at distance and more line speed! Super durable also.

This in my opinion is the best all around line on the market, winning a ton of awards in the past two years! This line is durable and really performs in all conditions. This line has what's called a camo tip in the final ten feet of line, allowing you to gauge distance with ease. Really well designed taper. It performs in all water types, it's extremely durable, and the new AST plus has your line smooth as butter. It outlasts any other line that I have had the chance to test!

Scientific Anglers Amplitude Smooth Trout Freshwater Fly Line
Keeping your line on top of the water, incredible smooth casting ability. Perfect for any nymphing presentation or for dry flies as well.

Scientific Anglers Amplitude Textured Trout Fly Line
AST plus slickness for superior shooting ability and increased durability, ultimate floating with textured tip. Shooting texture running line delivers longer casts, revised compound taper for delicate deliveries. Excels in medium-to-long distances with dry flies and smaller nymphs and streamers.

Top-tier line. Low friction coating allows the line to shoot out of the guides on the rod for extra distance. High float and low surface tension on the water!

Throwing a variety of flies for trout species but will work great for stuff like small-mouth bass too.

Scientific Anglers Mastery Bass Bug Fly Line
Specifically designed for bass fishing. This line is super durable and casts smoothly.

Scientific Anglers Amplitude MPX Fly Line
This line is the undisputed champ as far as trout lines are concerned. The taper will allow for easy (and I mean easy) loading on the rod for quick casts while not sacrificing delicacy. Trout, bass, even light salmon flies are no problem whatsoever for this line. Chuck your favorite dry one day and a streamer the next. You would love it all and with ease!

This line comes a half size larger and makes casting larger flies easier. It has the latest AST technology from SA, this makes the line slicker with use and also helps with the durability of the line.

Amazing shootability, the AST Plus coating is best-in-class and unbeatable when it comes to line slickness. Super durable and will last you a long time.

Scientific Anglers Mastery Infinity Fly Line
A fantastic all around fly line! This is a very solid line that just lasts forever! It's hard to beat Scientific Anglers lines. They have great customer service and outstanding performance! It has the power to launch streamers with ease, yet deliver dries with enough delicacy! They call it the infinity line for a reason, the options and range are nearly infinite!

Scientific Angler Amplitude Smooth Infinity Salt Fly Line
Take a look at one or the highest-performing lines on the market, the SA Amplitude series!
*AST Plus Slickness coating maximizes shooting ability and enhances durability.
*Built half-size heavy to handle large flies and windy conditions with ease.
*Extended head length for accuracy at distance.
- High-contrast sighter marking
*Tropi-Core maintains performance under tropical conditions.

A nice all-around taper that is versatile and chuck a variety of flies at long distances.

Scientific Anglers Mastery Standard Freshwater Fly Line
Mid-length head great for long casting and accuracy. Great for trout and bass.

Scientific Anglers Mastery Double Taper Freshwater Fly Line
Maybe not the most versatile double taper, but it's really good at delicate casts at shorter distances. Excels at presenting flies with a touch of grace.

Scientific Anglers Frequency Full Sink Fly Line
Intermediate sink. Perfect line for trout pools and versatile for other river options as well. Quality fly line for a great price. Great for moving water.

Scientific Anglers Amplitude Textured Infinity Salt Fly Line
This line has an slickness additive that makes it super slide like butter through the guides. This helps improve your casting distance and the life of your line. The infinity line is also handles big flies better than other lines because it is a half line weight heavier.

Scientific Anglers Frequency Saltwater Fly Line
An absolutely rock star value of a line from SA!
*All around saltwater performance.
*Overweighted to punch big bugs into the wind with authority.
*Compound taper excellent both on and off flats.
*Performs in a variety of temperature conditions.
*Braided mono core.

7/8 WT reel, engineered for saltwater application. Affordable option.

Scientific Anglers Amplitude Textured Anadro Indicator Fly Line
This line is made specifically for Steelhead and Salmon fishing. If you're planning on nymphing for Steelhead more than swinging streamers, this line is a great option. It'll work to throw streamers, but it's a wonderful option for long-line nymphing.

Scientific Anglers Amplitude Smooth Bonefish Saltwater Fly Line
Excellent mid-tier line from Scientific Anglers with a medium-length taper for quick shots at short distances! Good setup for wading or skiff fishing! Overall very versatile tropical saltwater line. Textured line for control and accuracy with Scientific Anglers AST coating for great shoot-ability. The 40' head allows for quick loading of a rod and subsequent quick shots for pursuing fast game!

Curated Experts don’t get paid by the manufacturer to write these reviews. All of their opinions are their own and unbiased. Want to learn more about our experts? Check out the video or view some of their profiles to learn more!
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