Superfly Holographic Superflash, also known as Krystal Flash. A staple material for fly tying many patterns. SuperFlash is a fine mylar that adds the perfect amount of sparkle and flash to any pattern. Use as an addition to hair wing patterns to add enticement or use with streamer bodies to create additional natural colors and flash. SuperFlash can be wrapped on hook shanks for great under-bodies or used as a rib to provide a wide range of attractive color combinations.