Wallets may have characteristics such as money clips; a coin purse; a chain fastener, strap, or rein; or a zipper. Specialized wallets are designed for holding passports, wearable ID cards, and checkbooks to give some examples. Some unusual wallets are worn on the wrist or shoe. In addition to their practical function, wallets may be used as a fashion accessory, or to demonstrate the style, wealth, or status of the owner.