SA Amplitude Smooth Infinity Plus Floating Fly Line
The SA Amplitude Smooth Infinity Plus is a scaled-up version of the general-purpose SA Infinity taper. Designed for full-size heavy rods and larger trout rigs, it delivers exceptional performance with fast casting speeds. Reducing the line by one size creates an AFFTA true standard weight, ideal for slower rods and advanced casters.
Engineered for high performance, this fly line offers up to five times less drag and eight times the durability of traditional lines. It features the revolutionary AST Plus Slickness additive, enhancing shooting ability and long-term resilience.
| Key Features |
|---|
| Braided multifilament core |
| AST Plus Slickness |
| SA Line ID |
| Welded loops |
| Improved dry tip |
| 90′ in length |
FAQ
What makes the AST Plus Slickness additive different from standard fly line additives?
The AST Plus Slickness additive improves shooting performance and increases durability by reducing friction during casting, allowing for smoother, more consistent casts.
Is this line suitable for both fast and slow rods?
Yes, the Infinity Plus is optimized for fast rods and heavy setups. By reducing it by one size, it becomes a true standard weight for slower rods and advanced casters.
How does the braided multifilament core improve performance?
The braided core provides greater strength and reduced drag, contributing to faster casting and improved line durability under heavy use.


Julian Bond –
This line casts smoothly even on my heavy-duty rod. The drag is noticeably less than my previous line, and it holds up well after multiple trips to the river. The dry tip performs reliably in wet conditions.
Connor Coleman –
I’ve used this line for several seasons now. It’s durable and handles large trout rigs without breaking. The shooting performance is excellent, especially in windy conditions.
Tracey Cornish –
Great for fast rods and large setups. A bit more expensive, but the performance justifies the cost. The welded loops are secure and the line doesn’t fray easily.
Heather Fraser –
The AST Plus additive makes a real difference in how it shoots. I can cast longer distances with less effort and the line stays intact even after rough handling.