Sufix Castable Invisiline™100% Fluorocarbon casts like mono and is virtually invisible. It is resistant to ultra violet rays that can damage lines, it is incredibly strong, abrasion resistant and sensitive. There is a very low-stretch index for optimal hook setting power and sinks 4 times faster than traditional nylon lines for getting your presentation to the strike zone faster. Castable Invisiline™has exceptional handling for both spinning and casting reels and the exclusive G² Precision Winding™virtually eliminates line memory.