Yo-Zuri HD Carbon leader material maximizes the advantages of fluorocarbon by combining it with a disappearing pink tint. Fluorocarbon is virtually invisible in water and red is the first color to disappear in the water column. Pink is the lightest shade of red and disappears the quickest. Yo-Zuri HD Carbon has excellent abrasion resistance, high sensitivity, superior knot strength, and is softer and more supple than other brands of fluorocarbon.