Armbands are bands worn around the upper arm, often made from fabric, rubber, or plastic. They can serve various purposes, such as identifying individuals, displaying support for a cause, or providing information. For example, athletes may wear armbands during competitions to signify their team or sponsorship. In some contexts, armbands are used as a form of protest or solidarity. For instance, during sports events, players might wear colored armbands to show support for social issues. Additionally, military personnel may wear armbands to denote rank or affiliation, making them easily recognizable in various situations.