N95 vs KN95 Masks: What's the Difference for Workplace Protection?
Published by Harmony Lab & Safety Supplies on Nov 03, 2026
Published November 2026
Both are filtering facepiece respirators rated to block about 95% of small airborne particles. The difference is who approves them:
- N95: approved in the US by NIOSH, part of the CDC.
- KN95: certified to a Chinese standard. NIOSH states that it "does not approve KN95 products or any other respiratory protective devices certified to international standards" (NIOSH).
For a US workplace respiratory protection program, choose a NIOSH-approved N95.
N95 vs KN95 Side by Side
| N95 | KN95 | |
|---|---|---|
| Approved by | NIOSH (US) | Certified to a Chinese standard; not NIOSH-approved |
| Filtration | At least 95% of very small (0.3 micron) test particles | Designed to filter about 95% under its own standard |
| Straps | Usually two headbands | Usually ear loops |
| Markings | NIOSH name or logo and an approval number (84A-xxxx) | Varies; no NIOSH approval |
| Fit for a US workplace program | Yes, once fit-tested | Not as a NIOSH-approved respirator |
How to Spot a Fake or Misrepresented N95
NIOSH lists these warning signs (NIOSH):
- No markings: there's no NIOSH logo or approval number on the face of the respirator.
- Ear loops with no strap behind the head. Most approved N95s use two headbands.
- "CDC approved" or "NIOSH approved" claims on KN95s. NIOSH doesn't approve KN95s.
To confirm an N95, look up its approval number on NIOSH's list of approved N95s.
Which N95 to Choose
- Valved or not: an exhalation valve, like the 3M 8210V or Moldex 2700, keeps the mask cooler on long shifts. Choose a non-valved model where the wearer's breath must be filtered too.
- Cup or flat-fold: cup styles like the 3M 8210 and Moldex 2200 hold their shape. Flat-fold styles like the 3M 9105 VFlex and Honeywell DF300 pack flat.
- Healthcare settings: use a surgical N95, such as the Medline cone-style surgical N95.
See all disposable respirators.
Fit Matters More Than the Label
A respirator only protects if it seals to the face. Workplaces that require N95s need a fit test for each model and size, and wearers should do a seal check every time they put one on. If you can't get a seal, try a different model or size.
Frequently Asked Questions
Is a KN95 as good as an N95?
Both are designed to filter about 95% of particles, but KN95s are not NIOSH-approved, and NIOSH has flagged many counterfeit and misrepresented masks sold in the US. For workplace protection, use an N95.
Can KN95s be used in a respiratory protection program?
Not as NIOSH-approved respirators. Check with your safety officer.
How long can I wear an N95?
It depends on the setting and the manufacturer's instructions. Replace it when it's damaged, dirty, wet or hard to breathe through. See Can You Reuse N95, KN95 and Surgical Masks?
Sources: NIOSH, Misrepresented Masks and Other Face-Worn Products; NIOSH, NIOSH-approved N95 Particulate Filtering Facepiece Respirators.