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Scientific Anglers Amplitude Smooth Infinity

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SA’s NEW Go-To Fly Line for All Freshwater Species


Scientific Anglers brand new Amplitude Smooth Infinity fly line is a great general purpose freshwater line. Built a half of line size heavy to quickly and efficiently load today’s faster action fly rods with an extended head length for greater accuracy over longer distances and easibility to mend the line.

Scientific Angler’s brand new Amplitude Smooth Series of fly lines combine the slickness and durability of their proprietary AST Plus additive with a classic smooth fly line coating, eliminating the “humming” found in the standard Amplitude and Wavelength fly lines.

The Infinity fly line comes in two different color styles with three differentiating color-ways to help quickly identify the separate parts of the line, and welded loops for quick and easy rigging.

Optic Version – Optic Green/ Mist Green/ Buckskin

Camo Version – Bamboo/ Buckskin/Camo

Available in weight-forward floating lines from 3-9 weight.

• Features the revolutionary AST Plus slickness
additive for superior shooting ability and increased
• Extremely versatile general-purpose taper designed
for most freshwater species; an excellent line for
trout, grayling, panfish, bass, carp, steelhead,
salmon, and pike
• Made a half-size heavy to load fast-action rods, but
works well with a variety of rod actions
• Extended head length for long-distance casts and
superior mending ability
• Excellent for dry flies, nymphs, and streamers
• Available in two color schemes: standard and
camo; the camo scheme features a mottled
front taper for increased stealth
• For use in moderate and cold climates
• Braided multifilament core



Color Style

Optic Version, Stealth/Camo Version


WF – 3 – F, WF – 4 – F, WF – 5 – F, WF – 6 – F, WF – 7 – F, WF – 8 – F, WF – 9 – F