Tsunami Premium Copolymer Monofilament Fishing Line – Strong, Soft, and Abrasion-Resistant Tsunami Premium Copolymer Monofilament is designed for superior casting performance. This advanced copolymer line is softer than standard nylon for easy knot tying, offers reduced memory for smooth handling, and provides excellent abrasion resistance for durability. Available in sizes from 10 lb to 80 lb test, it meets all your fishing needs. Convenient ¼ lb spools are easy to store in your tackle box, boat bag, or vehicle. The super-clear finish makes the line nearly invisible underwater, giving your bait or lure a natural presentation.