A mustache is a strip of facial hair that grows above the upper lip. It can vary in style, thickness, and length, and is often groomed to create different looks. Mustaches have been worn by men throughout history and can symbolize various cultural or personal identities. Different styles of mustaches include the handlebar, pencil, and horseshoe. Some people grow mustaches as part of a larger beard, while others may choose to keep it as a standalone feature. Mustaches can be seen in various cultures and are sometimes associated with specific professions or social movements.