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Scientific Anglers(TM) Technology

Better Cores & Coatings

A core determines the line's tensile strength, stretch, and stiffness
A core determines the line's tensile strength, stretch, and stiffness. Altering one affects the other two.
Hollow, braided multifilament core
Our hollow, braided multifilament cores are more supple and more suitable for all weather conditions.
Stiffer braided monofilament core
Our stiffer braided monofilament core reduces tangling and is ideal for warmer, tropical waters.
The core – the backbone of every Scientific Anglers™ fly line.

Throughout the years, Scientific Anglers™ has optimized core design and continues to lead the industry. The overall design and construction of fly line cores is a time-intensive, complicated, and costly endeavor. But thanks to our proprietary 3M processes, at Scientific Anglers™ we're able to achieve the optimal balance of properties for the industry's most-trusted performance.

Ultra 4 floating fly lines
Ultra 4 floating fly lines use AST, which won't wear off or wash off. AST is always slick and never needs dressing.
3M Microballoons
3M Microballoons™ – applied in different amounts in different lines – allow us to control the density of our floating lines.
Powdered-tungsten in our sinking-line coatings
Using powdered-tungsten in our sinking-line coatings allows us to create denser, environmentally safer lines.
The coating – it separates Scientific Anglers™ fly lines from all others.

Our unique experience and advanced processes allow us to make each line with the optimal casting weight needed to load the fly rod and set higher standards in maintenance-free excellence in every area of fly line performance.

  • Permanent slickness unsurpassed in fly fishing.
  • Optimal floatation via proprietary 3M technology.
  • The industry's most dependable sink rates.
  • Superior chemistry equals unmatched durability.

Read about Advanced Taper Design.