Scientific Anglers Amplitude Smooth Infinity Plus

$99.95

Scientific Anglers Amplitude Smooth Infinity Plus

Load the fastest rods and handle larger trout rigs with the Scientific Anglers Amplitude Smooth Infinity Plus fly line. Crafted full-size heavy and enhanced with the revolutionary AST Plus slickness additive, this floating line delivers 5x less drag and 8x the durability of standard lines. Features an extended head length for premium long-distance mending, stability, and turn-over power.

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SKU: N/A Category: Fly Lines Tag: New for 2026

Description

Scientific Anglers Amplitude Smooth Infinity Plus

Ultimate Smooth High Performance Fly Line for Fast-Action Rods

The Scientific Anglers Amplitude Smooth Infinity Plus represents the next generation of freshwater fly line performance. Built as a full size heavy floating fly line, the Infinity Plus is explicitly scaled up to load today’s fastest, high-modulus fly rods. Available online at Fly Fishing Outfitters, this line delivers up to five times less drag and eight times the structural durability of traditional fly lines, giving you an unmatched casting advantage on big water.

Advanced AST Plus Slickness and Long-Head Taper

What places the Scientific Anglers premium smooth series at the top of the industry is the revolutionary AST Plus slickness additive. Unlike temporary topical coatings, AST Plus is chemically mixed directly into the line’s formulation. This ensures continuous, lifetime lubrication that improves shooting ability, helps lines float higher, and keeps your guides completely clean. Featuring an extended head length, the Infinity Plus taper behaves flawlessly whether you need to mend at distance, turn over massive indicator rigs, or cut through a brutal headwind.

Key Design Features:

Built Full Size Heavy: Specifically designed to easily load modern fast action fly rods without needing to overline your rig.
Versatile AFFTA Tuning: Underlining the Infinity Plus by exactly 1 size creates an AFFTA true standard weight for slower, moderate-action rods or technical casters.
Improved Dry Tip Technology: Advanced floating properties keep the line’s tip riding high to ensure fast, quiet pick-ups and zero spray.
Braided Multifilament Core: Delivers high performance in cold to medium freshwater temperatures while retaining zero line memory.

Scientific Anglers Amplitude Smooth Infinity Plus Line Specifications

Review the breakdown of grain weights and head lengths below to select the exact fit for your fishing environment. Color profile is Mist Green/Buckskin/Willow.

Line Model Weight	First 30′ Weight	Total Head Weight	Head Length	Total Length
WF-4-F	140 grains	205 grains	48 feet	90 feet
WF-5-F	160 grains	245 grains	49 feet	90 feet
WF-6-F	185 grains	285 grains	50 feet	90 feet
WF-7-F	210 grains	330 grains	51 feet	90 feet
WF-8-F	240 grains	385 grains	52 feet	90 feet

*All Scientific Anglers premium lines are equipped with integrated SA Line ID markings on the coating and welded loops on both ends for fast rigging.

Why Shop Scientific Anglers Online at Fly Fishing Outfitters?

When ordering from Fly Fishing Outfitters, you get expert support from technical gear specialists. We ensure your line configuration perfectly balances your fly reel and rod to deliver the absolute peak of its long-distance casting potential.