3M™ 8511 N95 Maintenance Free Respirator with Exhalation Valve

3M™ 8511 N95 Maintenance Free Respirator with Exhalation Valve is suitable for use in dusty environments or spraying that are not oil-based and do not emit harmful vapors. The exhalation valve makes breathing more comfortable for the user as warm / hot air is expelled out of the respirator. Packed in a box of 10 pieces per box.