SpiderWire Stealth is made from Dyneema , The World's Strongest Fiber! Available in Moss Green for low-visibility underwater and Hi-Vis Yellow for visibility above water. Constructed to provide ultimate strength with the thinnest diameter for smooth and quiet performance. The no-stretch properties of Dyneema PE fibers provide incredible sensitivity to instantly detect bites and structure. Product Features 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