SUFIX Advance Fluorocarbon Leader 40 lb Clear The Sufix Advance Fluorocarbon Leader features a Gel Phase Technology GPT Process that produces the ultimate fluorocarbon leader in performance, clarity and UV ray protection. The leaders have incredible shock absorption and knot strength. These leaders are virtually invisible underwater. They have superior abrasion resistance to all the elements. The G2 Precision Winding is virtually memory free allowing your presentations to move more natural.