That image of "robbers" with a bandana over their mouths seems so wild west. Are the po' just re-living their childhood movie-spawned fantasies?
Seriously though, if you wanna look like a ****ing terrorist, wear the bandana as mentioned and add a hood and ski goggles. It's great.
ps - also, I find that frost tends to form on the mouth part of the kerchief, forcing me to breathe creatively.