Unfortunately, there are several different types of synthetic polyamide polymers sold as nylon and no applicable standards for the test methodologies, so it's impossible to compare published ratings from different sources. Our supplier tested both our polyester line and a widely used white nylon line found on reels, using the same dry method for each test. The results show both have several hundred pounds of breaking strength, although in water our polyester round braided lines are noticeably stronger and more abrasion resistant. More information on technical characteristics is available in our Tek-Tip on Reels.