What is the name for a cowboy outlaw bandana mask?

The name for a cowboy outlaw bandana mask is often referred to as a "bandana" or "face bandana." It is typically worn to cover the lower half of the face, providing protection from dust and the elements, while also serving as a symbol of the outlaw persona in Western culture. Some may also call it a "neck gaiter" or "face mask" in more modern contexts.