Odorless, portable, easy to carry. The tags are made of polypropylene which is reusable and not easy to break. Suitable for distinguishing personal items as key label tags, luggage tags, pet name tags and storage tags. The key tag is easy to disassemble. You can easily take out the card by opening the cover. A plastic cover over the inside paper to avoid damage from water or sweat. The cover closes so well that the card does not slip and ink does not fade.