RIO's newest tippet material features an exceptionally high tensile strength to diameter ratio. It's very easy to tie knots with, has high knot strength and a smooth finish that ensures knots seat easily and tightly. Made from 100% fluorocarbon. Extremely high tensile strength. Ideal for dry flies, soft hackles, nymphs and streamers. Easy to tie any kind of knot. Imported. RIO Fluoroflex Strong Tippet Multi Color 6X, Fluorocarbon