An obi is a strip that is looped over one side or folded over the top or bottom of jackets, books, cd and dvd cases, and video games. Obis are often used to provide the title of the product, track listings, price, catalog number or information on related releases, but essentially they can be used for any purpose and can provide an interesting additional design element. Often, it is used by the consumer to determine what is included in the album or book. Products with an obi have become popular with some collectors, can fetch premium prices, and are collectible items in their own right.