The fluorocarbon we use for Bass Pro Shops Excel Ice Fluorocarbon Fishing Line is pure PVDF line, not just coated, so its abrasion resistance is outstanding. Excel’s silicone finish and copolymer formula ensure a line that's soft and smooth with superior knot strength and impact-shock resistance. The refractive index of this 100% fluorocarbon is the same as water, making it invisible to fish. Excel Ice Fluorocarbon Fishing Line sinks exceptionally fast, helping anglers to acquire jigging rhythms easily. The line's low stretch provides maximum sensitivity to anglers, making it easier to detect bites.