Medium stiff, 100% fluorocarbon. Ideal for saltwater species and throwing large flies. RIO's Fluoroflex Saltwater Tippet is medium stiff and made from 100% fluorocarbon material. A tough saltwater tippet, the Fluoroflex 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 saltwater species, especially snook, tarpon and even muskies!