RIO’s Fluoroflex Strong Tippet is a bit softer than the saltwater version but is still made from 100% fluorocarbon material. This tippet can be used in either freshwater or saltwater. A tough tippet, the Fluoroflex Strong is abrasion resistant, super strong, and easy to knot. Great for casting the largest of flies and in tough winds, this tippet is great for all freshwater and saltwater species, especially giant trevally, permit, and bonefish!