UV Blend Dubbing combines two functions in a single material: the natural components provide the overall color, and UV Ice Dubbing adds the shiny fibers. The mixture is pre-made, so you get both of these qualities without having to combine the ingredients yourself.
It is worked into fly bodies, with subdued or brighter tones depending on the recipe. A small amount applied evenly along the thread helps maintain a uniform body. The amount of material determines the volume; the chosen color sets the background against which the UV reflections stand out.