What brand of mask is better?

There are many brands of masks, 3M, Honeywell, Doelger, Nanhe and Twelve Officials. In fact, no matter what brand of masks are produced based on the corresponding industry standards, we can buy them as long as the standards meet the defense requirements we need. For example, medical surgical masks used to defend against pneumonia and influenza viruses must meet YY0469-20 1 1 standard. However, in the face of a mixed market, it is also necessary for us to know some common mask brands to prevent them from falling into the pit.