Klein Tools 60552 Reusable P100 Half-Mask Respirator

The trade-offs behind this choice are worked through in 3m 2091 vs 2097 filter, 3m 2091 vs honeywell north 7580p100, 3m 6000 vs 6500 respirator, 3m 6000 vs 6500 vs 7500 series half mask respirator compared.

The rest of the range sits in 3m 6000 series full face mask respirator, 3m 60921 vs 60923 vs 60926 respirator cartridges, 3m 7800 series full face mask respirator.

Written by Steven Eaton, WC Safety editor. WC Safety is an independent PPE review site, holds no inventory and sells nothing directly; Amazon links are affiliate links that earn a commission at no cost to you and never affect the assessment. This page is not medical, legal or regulatory advice.

Further reading that bears directly on this choice: 3m 6001 vs 6003 cartridge, 3m 6003 vs honeywell north 7583p100l, 3m 60921 vs 60923 cartridge, 3m 60921 vs 60923 vs 60926 cartridge.

Alternatives at the same protection level are listed in 3m disposable respirators, 3m full face mask respirators.

Read our detailed Klein Tools 60552 Reusable P100 Half-Mask Respirator review — strengths, limitations, and the alternatives that matter.

[{"q":"What does the P100 rating mean?","a":"Under 42 CFR 84 the letter and the number answer different questions. The letter is oil resistance - this one is oil proof. The number is filter efficiency against the most-penetrating 0.3 micron particle size, so 100 means 99.97% efficiency."},{"q":"Is a P100 better than an N95 for my job?","a":"It filters more efficiently, but under OSHA 1910.134 Table 1 every filtering facepiece carries the same assigned protection factor of 10. Moving up the filter scale changes what passes THROUGH the filter, not what leaks around the face seal - and the seal is the limit."},{"q":"What protection factor can I plan on?","a":"Ten. OSHA 1910.134 Table 1 assigns an APF of 10 to every filtering facepiece respirator regardless of whether it is rated 95, 99 or 100, so the maximum use concentration is ten times the exposure limit. If you need better than that, the answer is a different class of respirator, not a better disposable."},{"q":"Does it protect against gases, vapours or solvents?","a":"No. A particulate filter does nothing about gases or vapours. Those need a chemical cartridge on a half-mask or full-face facepiece, and a nuisance-level organic-vapour layer on a disposable is a comfort feature, not a rated filter."},{"q":"What does an exhalation valve change, and what does it not?","a":"A valve lowers breathing resistance and heat on exhale, which matters over a full shift. It does NOT raise the protection the wearer receives, and it provides no source control - a valved respirator vents the wearer's unfiltered breath, so where the point is to protect other people or a sterile field the unvalved version is the correct choice. Whether a given model has one is on its own listing."},{"q":"Do I need a fit test before using it?","a":"For occupational use, yes. 29 CFR 1910.134(f) requires a fit test before first use and at least annually after that, on the specific make, model and size that will be worn - a different size is a different respirator as far as the seal is concerned. Separately, Appendix B-1 requires a user seal check on every donning."},{"q":"Does facial hair stop it working?","a":"Yes. Hair crossing the sealing surface prevents a seal, and 1910.134 requires the seal area to be clean-shaven on any tight-fitting respirator. No strap tension compensates for it."},{"q":"How long can one be worn before it is discarded?","a":"Discard it when breathing resistance has risen noticeably, when the facepiece is soiled, damaged or deformed, when the straps have lost tension, or when a seal check can no longer be passed. Straps and the nose foam usually fail before the filter loads up."},{"q":"Can it be washed or reused between shifts?","a":"No. Washing destroys the filter media and the seal. A disposable filtering facepiece is discarded, not cleaned."},{"q":"What is the difference between a respirator, a surgical N95 and a surgical mask?","a":"A NIOSH-approved respirator is tested for filtration and fit and carries an assigned protection factor. A SURGICAL N95 is both NIOSH-approved and FDA-cleared for fluid resistance, so it does both jobs. A plain surgical or cloth mask is neither - no protection factor, no NIOSH approval. The approval is printed on the device; read it there rather than inferring it from the shape."},{"q":"Can it be used in a confined space or an unknown atmosphere?","a":"No. No air-purifying respirator may be used in an IDLH or oxygen-deficient atmosphere under 1910.134. Those conditions require supplied air or an SCBA, and no filter rating changes that."},{"q":"How should it be stored between uses?","a":"Clean, dry and uncrushed, away from contaminated air. A respirator stored loose in a toolbox or a pocket deforms, and a deformed facepiece will not pass a seal check even if the filter is untouched."}]