P95 mask vs. N95 mask

P95 and N95 are rating classifiers for masks manufactured to keep people from inhaling dust and other small particles in unsafe environments.
IEEE

A Test Bench for Replicating Human Breathing: Evaluating Thermal Effects of N95 Filtering Facepiece Respirator Leaks – Preliminary Findings

Abstract: Following the COVID-19 pandemic, it seemed important to develop alternative methods for verifying the fit of a filtering f acepiece respirator (FFR). I nfrared technology, promising in the ...