Nonwoven fabric is a material commonly used in medicine, and the support part of the mask is also nonwoven fabric. However, the density of nonwoven fabric is limited due to its material characteristics, and its ability to filter bacteria and viruses is relatively weak. Therefore, non-woven fabric alone cannot play the role of medical mask filtration. Of course, three-layer nonwoven fabric can be much better than single-layer, but can be used as general protection. However, if you are in contact with a suspected patient, a triple non-woven mask poses a huge risk. Source: Dr. Yurai