Remember, when it comes to respirators, comfort is key because if you aren't wearing one then all of your protective gear is pretty much useless. Free N95 masks denver free N95 mask some are designed to be worn on the face while others are designed to cover the mouth and nose only. N95 USA kids N95 made in USA like pollen as well as spores. It won't stop bullets or knives. If it becomes damaged or wet while worn, or if particles get lodged in it while you're using it ( which they will ) , it is no longer safe to wear. Cleaning your N95 mask properly will help stop the spread of infections like the flu and tuberculosis if you must wear one while working.