A knotless, tapered 100% fluorocarbon leader for the utmost in stealth 100% fluorocarbon for the utmost in stealth Long butt section for great turnover and presentation Hand tied perfection loop in the butt for quick rigging RIO&';s Fluoroflex trout leaders are made of 100% fluorocarbon, and are the perfect solution for when a nearly invisible presentation is required in clear water and for spooky fish. Each leader has high abrasion resistance and excellent tensile and knot strength, and have a long butt section that will turn over flies effortlessly. 9ft leaders are available in 8 sizes from 7X (1.5lb) to 0X (10lb).