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Respirator FAQs


An N95 FFR is a type of disposable respirator where the filtration media is the respirator. The respirator forms a tight seal to the face and removes particles from the air that are breathed through it. These respirators filter out at least 95% of very small (0.3-micron) particles. N95 FFRs are capable of filtering out particles, including bacteria, viruses, and dust.

Respirators are available in multiple size configurations and are not standardized across models. Fit testing is needed to determine if a particular size and model of respirator provides you with an acceptable fit. Before you wear a respirator in an occupational setting, you must be fit tested for each respirator model you will wear for your designated work tasks.

For more information, see the NIOSH fact sheet, Filtering out Confusion: Frequently Asked Questions about Respiratory Protection, Fit Testing.