How to Put On and Take Off a Respirator Safely (Donning & Doffing)

Inspect it, position the facepiece over your nose and mouth, secure the top strap or headband first, then fasten the lower neck strap, mold the nosepiece with both hands, and finish with a positive- and negative-pressure user seal check. Securing the top strap first holds the mask in place while you tension the rest evenly.

Run two quick tests. Positive check: cover the exhalation valve (or cup a disposable) and exhale gently — the mask should bulge with no edge leakage. Negative check: cover the inlets and inhale gently — the facepiece should collapse toward your face and stay collapsed for about ten seconds. Feel around the nose, cheeks, and chin. Reseat and repeat if either fails.

No. A user seal check is a quick self-test you do every time you don the respirator to confirm it is sealing on that wearing. A fit test is a formal procedure done at least annually with calibrated equipment to confirm a specific make, model, and size fits your face. You need both. Learn more about fit testing in our dedicated guide.

Every single time you put on a tight-fitting respirator, before entering any hazardous atmosphere, under OSHA 29 CFR 1910.134. It only takes a few seconds. If you remove and re-don the mask during a shift, seal-check again each time.

First leave the contaminated area. Without touching the front of the facepiece, lift the bottom strap up and over your head, then the top strap, and pull the mask away by the straps. Discard a disposable or set a reusable facepiece down for cleaning, then wash or sanitize your hands immediately.

Removing the bottom strap first lets the mask pivot away from your face cleanly as you lift the top strap, so the potentially contaminated front falls away from you instead of being dragged across your nose and mouth. It reduces the chance of transferring contamination to your face or hands.

Not a tight-fitting one. Any facial hair crossing the sealing surface breaks the seal and lets contaminated air bypass the filter, and it will cause the seal check to fail. Clean-shaven skin at the sealing edge is required. If you have a beard, look at loose-fitting powered options instead — see our facial hair and respirators guide.

Common causes are hair or stubble on the sealing surface, twisted or unevenly tensioned straps, a one-handed nose-clip pinch, a worn or distorted face seal, glasses arms crossing the seal, or simply the wrong size or model for your face. Work through each; if it still fails, the sizing or model is likely wrong for you.

Snug enough to draw the facepiece uniformly against your face with no leakage, but not so tight that it distorts the seal or creates a sharp pressure point. Over-tightening to compensate for a poor fit usually pulls the seal open elsewhere. If you have to crank the straps to pass a check, the fit or size is wrong.

Use both hands, one finger on each side of the metal clip, and work it down the bridge and along the sides of your nose. A single one-handed pinch leaves a ridge that channels leakage. The nose bridge is the most common leak point on disposables like the 3M 8210, so spend an extra second here.

Discard a disposable N95 at the end of the shift, or sooner if it becomes damaged, visibly soiled, wet, or noticeably harder to breathe through. Disposables are single-use by design; the straps and nose foam degrade with handling, so reusing them risks a poor seal. The disposable respirator guide covers service life in detail.

Reusable elastomeric half-mask and full-face respirators are designed for repeated use — clean per the manufacturer's instructions, dry fully, and store sealed away from heat and sunlight. Single-use disposables generally should not be carried over, and any reuse policy must follow your employer's program and the manufacturer's guidance.

Don and seal-check the respirator first, then add safety glasses or a face shield, and re-confirm nothing has lifted the mask off the sealing surface. Glasses arms crossing the seal are a common, easy-to-miss cause of leakage on half-mask and disposable respirators.

An N95 filters at least 95% of airborne particles but does nothing for gases, vapors, or oxygen-deficient air. It is not enough for solvent fumes, paint vapors, confined spaces, or any IDLH atmosphere — those need the right cartridge or a supplied-air system. Match the device to the hazard using our respiratory protection guide before relying on any mask.

When the respirator is the wrong tool for the conditions. Air-purifying respirators cannot be used in oxygen-deficient (below 19.5%) or IDLH atmospheres, in confined spaces with unknown hazards, or against contaminants the filter isn't rated for. PPE is the last line of defense — elimination, substitution, engineering controls, and ventilation come first in the hierarchy of controls.