Our air cargo security labels have an enhanced performance tamper evident material that shows a clear void or open message when the seal is lifted. Initially developed for use on the doors and hatches of aircraft when they are parked overnight or in flight, however these air cargo security seals are ideally suited for use on most surfaces. This product gives visual evidence of tampering or illegal entrance on aircraft, vehicles, doors, sensitive equipment, lockers, containers, restricted areas, etc. These air cargo security is great for travel.