UV Polar Chenille- Medium. This has been a very popular material in the streamer world over the last three years, and for good reason…Not only is this great stuff for building flashy bodies and underwings, but big fish just seem to find it irresistible at times.. Long story short, this UV chenille features translucent fibers that move like marabou, and can be used on a wide variety of fly patterns. Available colors: UV black, UV gold, UV olive, UV olive brown, UV silver, UV pearl, UV brown, UV olive copper, and UV copper. Approximately 3 yards per package. Fibers are approximately 1/2″ in length.