Seaguar Fluorocarbon is renowned for its invisibility, superior tensile and knot strength, abrasion-resistance and UV- resistance. The fluorocarbon construction will not absorb water like most monofilaments. It will not inhibit the action, so your lure looks natural in the water. Because it's invisible, you can use a higher strength line for your leader without the fish ever seeing it. Comes in 25-yard spools.