Mask Filtration and Breathability Data

Test Method

The problem with mask testing is that most testing standards have a lot of variability.

Getting in touch with the main mask testing labs during the pandemic has been a struggle. This has caused a bunch of research institutions and DIYers alike to create their own test setups. This is a problem because these different test set-ups produce results that cannot be compared side by side. A good score in a non-representative test doesn’t mean anything.

Which metrics matter?

There are 3 criteria that matter most: Filtration, Breathability, and Fit. All three are critical to ensuring optimal mask performance. If one of these 3 is inadequate, the resultant mask is poor. We have independently validated fit with the Essential Mask Brace, and data can be found here. We have you covered.

Filtration Efficiency

The ideal is to have as high a filtration efficiency as possible. N95 respirators perform between 95% — 100%.


This is measured by “initial resistance” in the test set-up. Anything above 135Pa is very difficult to breathe through when properly sealed, and it is not recommended wearing for a long period of time.

Consumer-available Masks

Armbrust USA:

Healthcare-available Masks




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Fix The Mask — the technical.

Fix The Mask — the technical.

The latest data and information on the Essential Mask Brace and masks in general.