Out of stock
Scientific Anglers

Scientific Anglers Amplitude Smooth Infinity Fly Line · WF · 4 wt · Floating · Optic Green - Mist Green - Buckskin

$99.95

Color: Optic Green / Mist Green / Buckskin
Line weight
7 wt
8 wt
4 wt
3 wt
6 wt
5 wt
Currently out of stock
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The Scientific Anglers Amplitude Smooth Infinity Fly Line is designed for freshwater fly fishermen and is considered a high-performance, smooth fly line. With up to five times less drag and eight times the durability of traditional lines, this line has the power to cast large streamers, but maintain the finesse for dry fly presentations.

Key Features

  • Braided Multifilament Core – The core material of the fly line will help with overall line strength and reduce line tangles.
  • Heavier Than AFFTA Standard Weight – The actual line weight is designed to be slightly heavier than standard weight to more easily load modern, fast-action fly rods.
  • General Purpose Taper – The taper is designed to make this a versatile fly line with applications for most freshwater fishing.
Curated, Fishing Expert
Rylyn S., Fly Fishing Expert
Andrew Grandemange, Fly Fishing Expert
Have a question?
4.96 average rating

ColorOptic Green / Mist Green / Buckskin
Fly line taperWeight forward
Line weight4 wt
Fly line typeFloating
Total length (ft)90
Head length (ft)48
Grain weight (gr)130
Line typeBraided
Water typeFreshwater
Fly fishing typeDries, Nymphs, Streamers, Indicators, Poppers/Big Dries
Fish speciesTrout, Panfish, Pike, Steelhead, Carp, Salmon
Fishing typeFly
Head weight (gr)190
SizeWF-4-F

4.8/5
Matt Beam owns this product
Scientific Anglers has made the absolute best all-around use of a freshwater fly line with the Amplitude smooth infinity taper fly line. This line casts great on any fly rod, and SA makes extremely durable fly lines. It is oversized, helping with casting on most fly rods. Being oversized, however, this line can overload slower action rods and make those... Read more
Ideal for
  • All around use freshwater fly line
  • Superior durability
  • Casts on any rod
Not ideal for
  • Oversized and can overload slower action rods
Reviewed by:
Matt Beam
Fly Fishing Expert

Free shippingFree standard shipping for most items over $50 in the lower 48 states, $125 to ship orders to Alaska and Hawaii. Expedited delivery, if available, is an additional charge available at checkout. We do not ship internationally at this time.
Easy returnsWe offer a 30-day peace of mind returns on most items in new condition that are in their original packaging. Items purchased used are not eligible to be returned. Read our return policy for more detail

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Matt helped me out of the fog and the overwhelming state I was in trying to buy my first Flyfishing set up…. I would still be fishing for gear a month from now if it wasn’t for him sticking his hand out to me.
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I’ve dealt with more than a handful of folks on fb marketplace that were downright aggressive, mean, and unhelpful to me over a series of exchanges in my search for gear. Matt was everything but. He not only pointed me in the right direction but he was friendly and knowledgeable as well. I needed all the help I could get and he was there. Thanknu again Matt.
Adam B Verified CustomerFeb 25, 2024
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Fast, knowledgeable, and very helpful.
5 /5
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Joe Verified CustomerDec 23, 2023
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Matt was very helpful for a newbie!!
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I wanted to purchase gifts for my husband and son as they are slowly getting into fly fishing. Matt was really helpful in taking a look at what they already have and made excellent recommendations on what they need. I cannot wait to look like a superhero and see the joy on my son’s face with a big thanks to Matt!!
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Helped me with some valuable fly fishing knowledge that I lack coming from the conventional fishing world. Hooked me up with a good starter rod and even price matched it with another company. Will be coming back for a reel soon.
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Been fly fishing for yrs. Thought I would finally buy a dedicated streamer rod. Reached out to Matt on social media site and started asking questions. Told him what I was looking for and did t want to break the bank. Showed me his choices
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