What is the “wearable lifespan” of KN95, N95 or KF94 masks?
Most manufacturers will not clearly state this. However, many public health experts agree that in a non-health care setting these masks can be reused until visibly worn, dirty, or damaged. Do not wear these masks if they are wet. It is recommended that people have a few that they can rotate through to extend the usage – i.e., #1 on day 1, #2 on day 2, # 3 on day 3.
Rotating these types of masks as described above and storing them in individual paper bags or mesh fabric bags in between uses to protect them will extend their lifespan. The paper or mesh bags keep them protected between uses while also letting the masks air out.