Unfortunately, most masks that say they meet the KN95 standard simply don't [0]. Whilst there was an uptick in non-compliant masks after the pandemic, ECRI's fi

Unfortunately, most masks that say they meet the KN95 standard simply don't [0]. Whilst there was an uptick in non-compliant masks after the pandemic, ECRI's findings for previous time periods were about half of batches tested were faulty. [0] https://assets.ecri.org/PDF/COVID-19-Resource-Center/COVID-N95-Mask-Testing-Alert.pdf https://assets.ecri.org/PDF/COVID-19-Resource-Center/COVID-N...