Atlas Chartreuse UV Glow Yarn is a top choice among anglers tying flies and yarn eggs. Our unique fat and fluffy yarn makes great flies. With 18 colors to choose from , your fly options are endless. Whether you choose your favorite color or combination of colors, egg flies are very productive drift bait for trout, salmon and steelhead. UV Glow Yarn can also be used as a color attractor or scent holder.