Berkley® introduces the all-new IRONSilk®. No other monofilament fishing line stands up to wear and tear like IRONSilk. This line was built to be fished in the most abrasive environments like around zebra mussels, oyster beds, docks or rip rap. IRONSilk is up to 33 percent more abrasion resistant than other lines of the same diameter. For anglers, this means they can go to lines with smaller diameters without sacrificing any abrasion-resistant qualities.