SpiderWire Stealth Glow-Vis Braid is made from Dyneema, The World"s Strongest Fiber Each size is uniquely colored with special colorants that reflect ultra-violet rays above water for high line visibility, but will not reflect below water to provide the low visibility green that fish are less likely to visually detect. Braid constructed to provide the ultimate strength with the thinnest diameter for smooth and quiet performance. The no stretch properties of Dyneema PE fibers provides incredible sensitivity to instantly detect bites and structure.