Berkley Trilene Grade 100% Fluorocarbon is the "XT" of fluorocarbons, and the choice of pros for nearly 10 years. This proven formula provides incredible shock strength, abrasion resistance and knot strength. Fast-sinking with greater line density for high sensitivity and less "bow" in the water - all advantages for feeling the bite, setting the hook, and landing more fish!FeaturesNearly Invisible - Similar refractive index to water so fish can't see itOptimal impact strength - Proprietary 100% PVDF formula specially processed for optimal impact strengthExcellent Manageability - Lower memory for superior casting