The replaceable filter is certified by the Guangdong Detection Center of Microbiology for GB 2626-2006, and meets the KN95 standard with ease, almost reaching the requirements for KN99 (see below documents). The KN95 label stands for the mask’s ability to filter out at least 95% of airborne particles larger than 0.3 microns (for reference, PM2.5 particules are 2.5 microns).
What is GB 2626-2006?
This Chinese standard specifies the self-absorption filter respirators against particles technical requirements, test methods and marking. This standard applies to all types of particulate matter protective self-absorption filter respirators.
National Labor Protection Equipment Quality Control Test Centre (Wuhan).