1, 3M is the brand name of the mask. The masks produced by 3M Company can all be called 3M masks. There are different types of masks under this brand: such as warm masks, anti-particle masks (dust masks), medical protective masks and medical surgical masks. There are different types of masks under the 3M mask, such as 3M9002 (headband, KN90), 3M90 1 (ear strap, KN90), 3M9002V (headband with valve, KN90), 3M9502(KN95) and 3M8205 (cup type, KN95).
2.N95 is the mask certification standard. As long as it meets the N95 standard and has passed the NIOSH evaluation, it can be called "N95 mask". The filtering efficiency of N95 mask for particles with aerodynamic diameter ≥0.3μm is over 95%. The aerodynamic diameter of airborne bacteria and fungal spores mainly varies between 0.7- 10μm, which is also within the protection range of N95 mask.