Scientific Anglers Amplitude Infinity Saltwater Fly Line
The first series of lines to feature the revolutionary AST PLUS slickness additive, the Amplitude series will shoot farther and last longer than any other line on the market. It’s slickness down to a science.
The Infinity Salt is technical, versatile, accurate and simply the most advanced saltwater line available. Featuring the revolutionary AST Plus slickness additive for superior shooting ability and increased durability, the Infinity Salt will handle the most rigorous of conditions year after year. Infinity Salt is a half line weight heavy to turn over any fly on even the windiest of days. The extended head length makes it more accurate than short shooting heads so that you can land your fly to spooky fish in the most efficient manner.
Key Features
- Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
- Extended head length for greater accuracy and efficient fly placement
- Half line weight design for reliable fly turnover even in windy conditions
- Engineered to perform in harsh saltwater environments year after year
| Specification | Value |
|---|---|
| Line Type | Saltwater Fly Line |
| Weight Class | Half Line Weight |
| Special Technology | AST Plus Slickness Additive |
| Shooting Performance | Superior, long-range accuracy |
| Durability | High resistance to saltwater wear and UV exposure |
FAQ
What makes the AST Plus slickness additive different from other additives?
The AST Plus additive is specifically engineered to improve shooting distance and line durability in saltwater conditions, providing a smoother, more consistent performance over time.
Is the Infinity Salt suitable for use in windy conditions?
Yes, the half line weight design and extended head length allow for reliable fly turnover even in windy environments.
How does the extended head length improve accuracy?
The longer head provides better control and more consistent fly placement, enabling precise targeting of fish in open water.


Leah Paige –
This line performs exceptionally well in saltwater fishing. The shooting distance is noticeably longer than my previous line, and it holds up well even after multiple uses in rough conditions. The accuracy is excellent, especially when targeting fish in open water.
James Tucker –
I’ve used this line for several seasons now and it still performs as well as the first time. The slickness and durability are outstanding. It’s a game-changer for long-range casting in windy days.
Leonard Peake –
Good performance overall. The extended head helps with accuracy, and the line feels smooth during casting. A bit more expensive, but worth it for serious saltwater anglers.
John Nolan –
The AST Plus additive makes a real difference. I can cast farther and still maintain control. It’s durable and handles saltwater exposure without fraying or breaking.