An extremely durable synthetic fiber with 0% water absorption and natural floating property, that sheds moss and algae, is marking-pen friendly, and can be trimmed to any desired length with a scissor. Very Fine Diameter Translucent Fiber for Dry Flies 8" Length - Approx. 5 gr. Per Pack Extremely Durable Synthetic Material 0% Water Absorption Natural Floating & Non-Stick Property Perfect for Mayflies, Emergers, Crippled, Spinner, Midge and Caddis The first 100% synthetic fibers created specifically for dry flies, designed to match a multitude of Mayflies found worldwide.