It offers excellent presentation, the material is three times heavier than water so when using Buzzers, Nymphs etc it gets down quickly to the desired depth & when using dries the material sinks, leaving the dries suspended in the surface film. Fluorocarbon has the same refractive index in water, as water itself & is therefore the most invisible line available. It also has a lower diameter than standard nylon, again aiding in presentation, & superior knot strength, it is the first choice for the serious angler & competition angler.