How To Don And Doff A Respirator

Follow the manufacturer’s donning sequence for your specific make and model — NIOSH points wearers to the instructions supplied with the respirator, and the sequence differs between cup-style disposables, elastomeric half masks, and full facepieces. The steps every model shares: inspect the respirator, position the facepiece over your nose and mouth, secure the head harness so the facepiece sits stable, mold the nosepiece if there is one, and finish with the user seal check that applies to your respirator.

Use the procedure specified for your respirator: OSHA 1910.134 Appendix B-1 permits either its positive- and negative-pressure checks or the manufacturer’s recommended method when it is equally effective, and the appropriate check depends on the respirator. Appendix B-1 versions: positive — exhale gently with the exhalation path blocked; slight pressure should build with no outward leakage. Negative — block the inlets, inhale gently so the facepiece collapses slightly, and hold about ten seconds; it should stay collapsed. Many filtering facepieces instead use the manufacturer’s cup-the-mask method printed on the packaging. Reseat and repeat if a check 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 qualitative or quantitative procedure — pass/fail with a test agent, or a numerical leakage measurement — required before first use and at least annually to confirm a specific make, model, style, 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, remove the respirator by its straps following your model’s doffing sequence and pull the mask away from your face. Discard a disposable or set a reusable facepiece down for cleaning, then wash or sanitize your hands immediately.

Follow your model’s doffing sequence — the manufacturer specifies the strap order so the mask pivots away from your face cleanly and the potentially contaminated front falls away from you instead of being dragged across your nose and mouth. The universal rules are to doff outside the contaminated area and handle the respirator only by its straps. 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.

Replace a filtering facepiece respirator when it is damaged, visibly soiled, wet, noticeably harder to breathe through, fails its user seal check, or when the manufacturer’s instructions or your employer’s respiratory-protection program require it. NIOSH notes that in most workplace situations an FFR can see limited reuse by the same wearer under the employer’s program — unless the manufacturer designates it single-use or the program excludes reuse (for example, after exposure to contact-transmissible agents). There is no universal end-of-shift discard rule. 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. A filtering facepiece may be carried over and reused by the same wearer only where the manufacturer’s guidance and your employer’s program allow it — store it clean and dry between uses, and replace it on the conditions above. If the manufacturer designates it single-use, do not reuse it.

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.

Don the respirator after garments but generally before gloves and eye protection that could interfere with the seal, then run your seal check. On doffing, the respirator usually comes off last, after gloves and other contaminated PPE are removed, so the mask protects your airway until you are clear. Follow your site's written sequence.

High on the crown and back of the skull, not low on the neck. A harness that slides down toward the neck pulls the facepiece down and lifts the seal off the chin, creating leaks. Reseat it high and retension evenly if the mask keeps drifting.

Follow the donning instructions printed on your model’s packaging — NIOSH directs wearers to the manufacturer’s procedure for the specific respirator. On a typical two-strap cup-style N95 that means cupping the respirator over your nose and mouth, placing the top strap high on the crown above the ears and the bottom strap below the ears, then molding the metal nose clip with both hands and running the manufacturer’s seal check (usually cupping the mask while exhaling and inhaling). See whether you can reuse it in can you reuse an N95.

The outer surface of a used respirator carries whatever you were protecting against. Removing it before leaving the area, or touching the contaminated front instead of the straps, transfers that hazard to your hands, face, and airway. Doffing in order — leave the area first, handle the respirator only by its straps, then wash your hands — keeps the contamination contained.

On a half mask, ordinary glasses sit above the seal and are usually fine. On a full facepiece, regular eyeglass temples break the face seal, so you must install a manufacturer spectacle kit inside the mask. Run a seal check with the glasses in place. Contact lenses are also permitted under OSHA for most operations.