Beyond Fluorocarbon Leader Material is made of 100% pure fluorocarbon leader material specified by the pros. Ultra-strong, abrasion-resistant construction allows you to yank a catch out of the toughest of situations and withstand rough-mouthed and toothy fish. Fluorocarbon has a lower-reflective index making it disappear underwater. Fish won't be able to see it coming. Superior knot strength cinches down beautifully to hold every knot you tie. Zero water absorption of Beyond fluorocarbon leader material allows for a very fast sinking rate compared with traditional mono line. 100% pure fluorocarbon leader material Ultra-strong, abrasion-resistant construction Disappears underwater Superior knot strength Fast sinking rate