Scientific Anglers SA Dacron Backing S20-20lb - Optic Green - 100 yd

Performance and color that backs your best days on the water

Scientific Anglers specialty colored Dacron backing is designed to connect your fly line to the reel with confidence and visual appeal. Its extremely thin diameter reduces bulk at the backing knot, while a low coefficient of friction helps the line glide smoothly under drag. This backing is built to perform when the moment matters, offering a quiet, reliable foundation for your casts and retrieves.

In demanding situations, the backing delivers high abrasion resistance, helping to extend the life of your setup during long, hard runs. The colorfast fibers resist fading after repeated casts and pulls, keeping the visual cues you count on for line management through changing water conditions.

• Extremely thin profile with low friction, strong abrasion resistance, and colorfast performance
• Available in six bold colors, including Optic Green
• Tri-color segments in 30 ft increments (Red/White/Blue and Green/Yellow/Red) for easy length tracking
• Tri-color segments in 100 ft increments (Orange/Yellow/Blue) for longer runs
• Vibrant and stealthy color options to match water clarity and fish activity

Real-world use and color options

Whether you're chasing steelhead, bonefish, or sizable freshwater species, this backing provides a dependable layer that helps you manage drag and line length while remaining visually accessible under water. The color-segment design makes it easier to gauge how much backing is left during a long fight or a careful layback, contributing to a calmer, more controlled session.

• Six bold colors to choose from, including Optic Green
• Color-segment design aids line management and casting rhythm

This 100-yard spool offers ample backing for multiple setups and seasons, letting you prepare with confidence. Pair it with your preferred fly line to balance load, feel, and casting efficiency on the water, whether in fresh or saltwater environments.