With a near perfect match to the refractive index of water, the Sufix fluorocarbon fishing line is virtually invisible when fished. Impervious to ultraviolet rays that can lead to damage, each fluorocarbon fishing line offers incredible shock absorption and high tensile/knot strength. Our fluorocarbon fishing line casts smooth and far, like mono, and sinks four times faster than traditional nylon lines, getting your presentation to the strike zone faster.