BERKLEY FluoroShield is the best of both worlds; a co-polymer core with a fluorocarbon coating. The fluorocarbon coating shields the inner co-polymer making it nearly invisible underwater and abrasion-resistant while remaining manageable for optimized casting distance. 2020 ICAST Online Best of Category Winner Fishing Line Fluorocarbon infused Co-polymer Nearly invisible underwater Abrasion resistance comparable to fluorocarbon