Question: which mask is best for pollution?
Answer: 3M™ N95 Respirators The most common and affordable mask are known that the 3M N95 masks (picture above is for the 3M 9501 model). Despite being very affordable (5 to 6 RMB a piece), the 3M N95 are always among the top performing masks for Particulate Matter (i.e. PM2.5 Air Pollution).