January 10, 2023: "Latex Particle Challenge Final Report", Nelson Labs

Report Excerpt:

"Summary: This procedure was performed to evaluate the non-viable particle filtration efficiency (PFE) of the test article. Mono-dispersed polystyrene latex spheres (PSL) were nebulized (atomized), dried, and passed through the test article. The particles that passed through the test article were enumerated using a laser particle counter."

Airlock Science:
Proven by Third-Party Testing

In January 2023, Airlock’s filtration element underwent independent third-party Nelson Labs particle filtration testing—captured more than 99%.