A mustache is a strip of facial hair that grows above the upper lip. It can come in various styles, from thin and neatly trimmed to thick and bushy. Many people choose to grow a mustache as a way to express their personality or to follow a trend. Some famous figures, like Albert Einstein and Tom Selleck, are well-known for their iconic mustaches. Caring for a mustache involves regular grooming, such as trimming and styling. Some people use products like mustache wax to keep the hair in place. Mustaches can also be a part of cultural traditions, with different styles representing various meanings in societies around the world.