Designed to protect unprocessed film from harmful X-rays during airport security and customs checks. Lead-lined bags also protect other sensitive media from the low-dosage X-ray machines used in airports around the world. Without FilmGuard, unprocessed film can become fogged or streaked. Use FilmGuard in carry-on luggage, because checked luggage is exposed to high-dosage X-rays that FilmGuard cannot protect against.