Cole-TAC Night Vision Guardian, Zipper Case, 7.5x6x5, 1000 Denier Nylon, Coyote Brown NVG1002 Cole-TAC's Night Vision Guardian (NVG) offers an enhanced level of protection for your expensive night vision devices. Designed to work seamlessly with their Brain Bucket Bag in protecting your precious kit and equipment from the elements" the Night Vision Guardian shields those valuables from unforgivable elements such as UV rays" dust" and shock.