A daring, yet absolutely safe choice.
Nose Mask is designed for blocking out particulates. Because they are smaller, it's easier to get a good seal. But keep in mind that if you breathe through your mouth, the positive effects of this mask are totally negated. Filters for the mask should be replaced monthly, saving you the need to buy a new mask each time.
Good for: People working in an office environment that is not air filtered. And don't mind looking a little porcine, it saves your life.