Positively the best line cleaner, conditioner, and UV block for fly lines. By cleaning, adding a slickness, filling in imperfections and protecting lines from the sun, Line Speed allows lines to cast farther and last longer. Unlike most line cleaners, Line Speed doesnt leave a sticky, dirt gathering silicone fluid coating. Apply with Loon's Line Cleaning Tool (included with Line Speed in Line Up Kit) and let sit overnight. 1 oz. bottle.