P-Line Fluorocarbon is extruded from the highest quality Japanese fluorocarbon crystals, ensuring the best knot and breaking strength available in a soft fluorocarbon line. As the educated angler knows, fluorocarbon has a refractive index very close to that of water, making it invisible once it enters the water. P-Line Fluorocarbon is hydrophobic absorbing very little water giving it great knot strength. The low stretch factor means increased sensitivity to feel even the lightest strikes.