High-Visibility Fluoro with Stealth Below the SurfaceK9 Hi-Vis Fluoro offers the same properties as the original K9 Fluoro in a high-visibility yellow format. It is easy to see above the water while remaining virtually invisible underwater making it a strong choice for anglers who want line visibility without sacrificing stealth. It is also a preferred option among serious crappie fishermen. Hi-Vis yellow fluorocarbon line Easy to see above the water Virtually invisible underwater Great for night fishing with blacklights Preferred by serious crappie anglers