UV Polar Chenille has been a very popular material in the streamer world over the last five years, and for good reasonNot only is this great stuff for building flashy bodies and underwings, but big fish just seem to find it irresistible. Long story short, this UV chenille features translucent fibers that move like marabou, and can be used on a wide variety of fly patterns. UV polar chenille fibers are approximately 1 in length.