Blue Label Fluorocarbon Leader - Incredible Impact and Abrasion Resistance. Fast Sinking, Double Structure for Strength and Softness. The Original Fluoro LeaderSeaguar Blue Label Leader Material is known the world over for its incredible impact strength and abrasion resistance. No wonder it's one of Seaguar's best sellers.Their exclusive double-structure process fuses two 100% fluorocarbon resins to create a leader with exceptional knot and tensile strength.Virtually invisible; made with cutting-edge innovation. It's a versatile choice that's proven on the water for dependability and consistency.FeaturesDSF - Exclusive double structure process creates line that's both strong and suppleAbrasion Resistance - Made for fishing around logs, rocks, docks, and in heavy grassLevel Wind - Eliminates cross contact of line to maintain strength and for enhanced castability