Scientific Anglers new Freshwater nylon tippet is, simply put, the strongest and most reliable they have ever created, with the highest knot strength ever. Period. You can fish the other stuff, or you can Fish the Truth. Up to 35% stronger than previous material. The highest wet-knot strength in the industry. True-to-spec X sizes. Length: 30-meter spools in all sizes. Low memory, high abrasion resistance, maximum knot strength. Patented cutter spool design.