Here’s a concise breakdown of the Scientific Anglers 50 lb Blue 500 yd XTS Gel-Spun Backing with free US shipping:
Key Features:
– Strength: 50 lb test
– Length: 500 yards
– Material: Gel-spun polyethylene (GSP) – ultra-thin, high-strength, and low-stretch
– Color: Blue (high visibility for easy backing management)
– Purpose: Fly line backing to increase reel capacity and fight large fish
– Advantages:
– Resists water absorption

– Durable and abrasion-resistant
– Minimal memory for smooth performance
Why Choose This Backing?
– Ideal for saltwater, big-game, or large freshwater species (e.g., tarpon, salmon).
– Compact diameter allows more backing on reels vs. Dacron.
– Free US shipping adds value.
Best For:
– Anglers needing high-capacity backing for deep-running fish.
– Those prioritizing strength-to-diameter ratio.
Tip: Pair with a quality fly line and reel suited for heavy-duty applications.
Let me know if you’d like comparisons or recommendations!