Krystal Flash is comprised of flat, fine strands of reflective mylar that are twisted, giving the flash an intermittent ''scaly'' look. Krystal Flash will pick up light from any direction. Krystal Flash can be used for a wide variety of fly tying applications; such as placing a few fibers in a parachute post to tremendously help visibility. Great for muskie, pike and bass flies as well as trout streamers and saltwater streamers.