An N95 respirator mask is like a surgical mask, but it protects against much smaller threats like viruses and bacteria than a surgical mask. Face Mask Demetech NIOSH N95 respirator face mask masks of a medical grade, such as N95 and KN95, as well as surgical masks, are designed for USAge in healthcare settings and have been subjected to testing. Small small N95 you can wear a half-mask over your nose and mouth, while a full face mask covers your entire face. N95s and KN95s should be reusable. According to the US CDC, KN95 respirators may also offer protection against smoke in wildfires, and they recommend looking for KN95s that fit similarly to those established by NIOSH, which is part of the US CDC ( see our top picks among the NIOSH-tested KN95 masks ) . Do they all protect you against germs like colds and influenza?