Fluorescent brighteners illuminate line above water, low vis green disappears below water. Enhance ability to watch line and detect bites that may not be felt. New Filler Package! New Smaller, Clear Spool! Less Weight! Less Waste! Color-Lock coating technology. Dyneema PE Microfiber construction is strong, smooth and round. Fluoropolymer treated microfibers - shoots through guides like a bullet! Whisper quiet for Stealth Attacks. Resists diggin in on reels.