The exclusive double-structure process fuses two 100% fluorocarbon resins into one solid line that offers the best combination of strength & castability. Soft, supple and smooth casting with exceptional sensitivity, low memory, virtually no stretch, fast sinking and superior knot strength for unmatched performance in most any conditions. Ideal for freshwater multi-species fishing applications - fish can't see it and it's very soft and sensitive. Easy to manage on a reel.