Fluorocarbon has a refractive index of light compared to nylon, making it difficult to see in the water.
In addition, the brown coloring makes it more natural to simulate it, making it outstanding.
This "Chinu Harris Trick" is made with brown color to prevent irregular reflections in the lines in order to make a vigorous chine (black snapper) in all situations, including the bang, river mouth, and beachground.
Now you can get rid of the years of the lost hundred war allure.