Our Fly Line Dressing improves and restores the slickness of new or used fly lines. It also reduces friction and improves glide through any-sized guide with ease, and provides the fly-fisher with a much more accurate cast. Of course, since it's a High N Dry product, it is 100% environmentally friendly and contains no harmful Volatile Organic Compounds (VOCs). It is also specifically designed to be used streamside as needed and is not affected by temperature extremes.