Yes, the K9 Mask Air Filters have been independently certified by an independent laboratory to test for filtration effectiveness.
You may review the results of these air filter efficiency tests using the following links.
Extreme Breathe XTRM N95 Active Carbon Air Filter
Clean Breathe PM10+ Active Carbon Air Filter
READ FULL INDEPENDENT ISO 16890 RESULTS ARTICLE
Learn More: K9 Mask Air Filtration Test with ISO 16890 Results