HALO The future of fluorocarbon fishing line is Co-Fluoride which blends various pure fluorocarbon crystals. The union of unmatched proprietary extrusion technology, coupled with the finest raw materials available. This has produced P-Line HALO Fluorocarbon; the first Co-Fluoride introduced into the United States. In a tireless effort of research and development, P-Line has engineered the next generation of fluorocarbon fishing line by introducing HALO Co-Fluoride. P-Line has blended different types of pure fluorocarbon crystals, giving anglers the best combination of strength, sensitivity and castability in the best all purpose fluorocarbon line available.