Why Should We Care? N95 manufacturer N95 pm2. 5 manufacturers the CDC says that if you are going to wear a mask, it should be rated N95.A mask with a N95 rating will stop 95% of particles that are 0.3 microns or bigger in size. Benehal MS8225 N95 Mask NIOSH Approved Benehal ms8225 N95 mask NIOSH approved avoid contacting the mask's outside, which could harbor bacteria. Even though it's not required by law, taking precautions against air pollution is a good idea if you live in China and are worried about your health. They offer all of them in three-packs, and also frequently at much higher amounts compared to exactly just what various other merchants provide. In the event of an airborne infection, such as Ebola, these masks are extremely useful.