The Scientific Anglers Fly Line Cleaner was specifically designed for line with AST and AST+, but works with all fly lines. The Fly Line Cleaner will restore your lines when they get dirty and start to sink, simply soak, wipe, and rinse your fly lines.FeaturesImbedded dirt on the surface of fly lines, retains water which causes them to sink, proper cleaning restores fly line performanceSpecifically for lines with AST and AST+, but works with all fly linesClean rinsing, biodegradable formulaSimply soak, wipe and rinse your fly linesRegular cleaning increases longevity4 oz.