RIO's Powerflex Strong takes nylon tippet to the highest level of performance thanks to an extremely high strength-to-diameter ratio specifically formulated for increased suppleness and supreme knot strength. For the discerning freshwater angler, Powerflex Strong is simply the best nylon tippet you’ll find anywhere on the water. Now available in three half-sizes. Suppler material for higher knot strength Incredible strength to diameter ratio Available in 30-yard spools