It has been recognized by “Advanced Filtration Manufacturers Association (AFMA)” that advanced materials used in face mask filtration should not be washed due to the material damage and decrease in filtration quality.
In light of the pandemic, the CDC understands Filtering Facepiece Respirators (FFR) decontamination and reuse may be needed during these times of shortage to ensure continued availability. If you choose to reuse the material, we recommend following CDC sanitization guidelines while continuing to handle your material with caution: Decontamination and Reuse of Filtering Facepiece Respirators.
Filtration efficiency in terms of bacteria filtration efficiency and particle filtration efficiency testing regarding the face mask media has been conducted by Nelson Laboratories. The results can be found under the material product page as well as here: