This line was designed by Tenkara master Hiromichi Fuji It is a tapered and twisted multifilament line, made from hi-vis orange nylon. Because of the taper and weight, it cast very well. Because it is nylon, it weighs and sags less than furled fluorocarbon lines of similar construction. In addition, because it is nylon, there is minimal water absorption. This line is easier to see on the water then level lines of similar color.