This Berkley Fluoroshield line consists of a polymer core with a fluorocarbon coating. It combines the suppleness and knot strength of polymer with the abrasion resistance of fluorocarbon. This line is perfectly suited for all modern techniques and long casts are no problem at all. Virtually invisible underwater so as not to frighten timid fish. The high knot strength and abrasion resistance make this line perfect for fishing in waters with many obstacles or bottoms with sharp stones.