Hmm, based on comments above, a bandana is kinda like ... a towel.
But you can't go around saying "I'm a guy who knows where his bandana is!" People will misunderstand.
> Arthur Dent would approve. :->
Another use, You can blindfold your self.
If you do not actually have to see the perils you are facing you can be less scared!
Sorry I had to.
More uses: Trail marker, and a pretty flexible dump pouch (tinder/edibles/morels)