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 perfect for all saltwater species, especially wary bones, snook, permit & tarpon. All sizes come in 30yd spools.Medium stiff, 100% fluorocarbon. Ideal for saltwater species and throwing large flies.