As you breathe through them, these respirators filter out contaminants in the air. Throw them out when breathing is difficult or if they’re damaged or dirty. They're best for short-term use and areas with low levels of contaminants.

To achieve the filter rating, you'll need a respirator that creates a tight seal with your face to prevent contaminants from entering through the sides. Choose the respirator that matches the style you have been fitted for.