Seaguar Blue Label Original FluorocarbonSeaguar Blue Label Fluorocarbon has the first ever Double Structure design of any fishing line that makes it one of the best on the market. Seaguar Fluorocarbon’s advanced strength allows it to be used in any type of fishing, Fresh or Saltwater. The Seaguar Fluorocarbon leader has incredible impact strength, knot strength and abrasion resistance. The FC Leader is much less visible underwater than monofilament line and virtually invisible to fish. Seaguar Original is also UV resistant, so it will never become brittle.