N95's not bad, but N99 (FFP3) is what you probably want for viruses. In theory these are designed to last a "shift" (8h). The manual should explain how to use i

N95's not bad, but N99 (FFP3) is what you probably want for viruses. In theory these are designed to last a "shift" (8h). The manual should explain how to use it safely. I'm not aware of the possibility of cleaning used masks. Just because the outside is clean, it doesn't mean the filter's still good. If you want something cleanable get a full face mask with a cartridge filter. These look like (and actually can be) a gas mask. It also clearly communicates that you're serious about this, unlike the peons with those silly normal masks.