Sci Angler Amplitude Smooth Infinity Plus Floating Fly Line
The Amplitude Smooth series of lines are, simply put, the highest-performance smooth fly lines in the world. With up to five times less drag and eight times the durability of traditional lines, this will change the way you look at fly line performance.
- Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
- A scaled up version of our general purpose Infinity taper, the Infinity Plus is built for full-size heavy rods and larger trout rigs
- Underlining Infinity Plus by 1 size creates an AFFTA true standard weight for slower rods and advanced casters
- Braided multifilament core
- SA AMP S INFNTY PLUS WF X F (X = line weight)
| Specification | Value |
|---|---|
| Line Type | Floating |
| Taper | Infinity Plus |
| Core Material | Braided multifilament |
| Drag Reduction | Up to five times less drag |
| Durability | Eight times more durable than traditional lines |
| Key Feature | AST Plus slickness additive |
FAQ
What makes the AST Plus additive different from other slickness additives?
The AST Plus additive provides superior shooting ability and increased durability compared to standard additives, enhancing line performance and longevity.
Is the Infinity Plus line suitable for heavy-duty rods and large trout rigs?
Yes, the Infinity Plus is specifically designed for full-size heavy rods and larger trout rigs, offering optimal performance under demanding casting conditions.
Can this line be used with slower rods?
Yes, by underlining the Infinity Plus by one size, it achieves an AFFTA true standard weight, making it suitable for slower rods and advanced casters.



Harry Lawrence –
This fly line casts smoothly and has much less drag than my previous model. I’ve been using it for several weeks on larger trout setups and it’s held up well under frequent use. The shooting performance is noticeably better, especially in windy conditions.
Leah Vaughan –
The AST Plus additive really makes a difference. I can cast longer distances with less effort and the line doesn’t fray even after repeated use. It’s a solid upgrade for serious anglers.
Wendy Morgan –
I switched from a standard floating line to the Infinity Plus and noticed a significant improvement in casting accuracy. It’s a bit heavier than expected, but it works perfectly with my heavy-duty rod.
Luke Ince –
Durability is excellent. After several months of regular fishing, the line still looks and performs like new. The braided core feels strong and doesn’t snag easily.