Scientific Anglers Absolute leaders are made with proprietary copolymer blends that are designed to drastically reduce water absorption while maintaining an optimal suppleness for high knot strength. Absolute nylon leaders and tippet have a 29% higher wet knot strength compared to our previous material and up to 40% higher wet knot strength when compared to our competitors. Our new paper-based leader packaging is now 100% recyclable. All materials, inks, and window are fully biodegradable to protect our streams and reduce our environmental footprint. Please don't litter.