Specially-made versions are also available for people in industrial jobs, and surgical N95 face masks are available for those in health care professions. The number refers to the percentage of particles that the mask can filter out. The N95 mask filters out 95% of dust and particulates. N95 masks shouldn’t be used if oil aerosols are present, as oil damages the filter. The “N” actually stands for “Not resistant to oil. ”

These masks also come with number classifications, such as P100 and R 95. The numbers stand for the percentage of particles they filter out. If you’re exposed to gases or vapors which are more concentrated than the exposure limits of these masks, look for a respirator that uses special canisters or cartridges to filter the air even more effectively.

Breathing problems Emphysema Chronic obstructive pulmonary disease (COPD) Asthma Cardio-pulmonary Immune compromised medical condition problems[4] X Research source

If you need an N95 mask for your job, your employer will likely be required to provide it. Masks that aren’t NIOSH-certified may not provide good protection.

Take your local environment into account when stocking up on masks. You’ll need more if you live in a big city with notable pollution problems, for example, than if you live in a more rural environment with cleaner air.

If it’s an emergency situation and you don’t have time to shave, fit the mask on as best you can.

Try to touch only the outside and edges of the mask to keep it clean.

If your mask doesn’t have a nosepiece, simply make sure the fit is tight and snug around your nose.

Don’t use an N95 mask on children younger than age 17-18. Older teenagers can try on an N95 mask to test the fit and comfort. If it fits well and forms a tight seal, have them try walking around with it, paying close attention to any feelings of dizziness or difficulty breathing. If these symptoms occur, have them remove the mask and go inside.

If your mask still isn’t completely sealed, ask a friend or family member for help, or try a different size or model.

You can either throw the mask away or store it in a clean, sealed container or bag. Avoid touching the mask itself, as it might be contaminated.