Rumrunn6, do you need your mouth uncovered all the time? If so, I think it would help to explain why. If it's a breathing issue, there are very good balaclavas and masks with breathable material, even holes for doing so like the above examples show. If it's to take a drink or eat, once again balaclavas and similar articles are usually stretchy enough to conveniently pull down to expose the mouth.

I've seen face masks with both eye and mouth openings, but those are seen on criminals in movies and video games, and I'm guessing that it was a do-it-yourself job with scissors.