Why is 0.3 Microns Discussed so Often?

Mask and respirator filtration is tested using challenging particles near a size range that can be particularly difficult for filters to capture.

A NIOSH-approved N95 must meet its required minimum filtration performance under specified test conditions.

Fit Still Matters

Excellent filter material cannot protect the worker as intended if contaminated air bypasses the filter through gaps around the face.

That is why purchasing an approved mask or respirator is only one part of the process.

Employers also need to ensure that:

• the respirator is appropriate for the hazard
• the exact product is fit tested on the worker
• employees know how to put it on correctly
• workers perform the appropriate seal check, and
• damaged or unsuitable equipment is removed from service

Filtration and fit work together.

N95 Does Not Mean Universal Protection

The “N” indicates that the filter is not resistant to oil.

The “95” describes its minimum filtration efficiency under the applicable NIOSH test conditions.

It does not mean an N95 is appropriate for every respiratory hazard.

The hazard assessment still comes first.

Why Should Decision Makers Care about the Science?

MaskFit+ comes from a family of nurses and educators, so making technical safety information understandable is part of how we approach the service.

“N95 filters everything” is wrong.

“Anything smaller than 0.3 microns goes straight through” is also wrong.

Employers do not need every employee to become a filtration scientist. (or specialist)

They do need the workplace to understand one practical principle:

The right respirator, the right fit and the right use all matter.

Call a MaskFit+ specialist now at 289-643-6222 to make sure you’re booking the right mask fit test.