Best to wash daily (and in a small wash bag) at 60°c. Handle with clean hands (only touch the ribbons) and place in a paper envelope or the reusable pouch. We suggest using a disinfectant spray to clean the pouch after delivery and before storing at home.
If you are not a healthcare worker, it is not required to use an extra filter. If you choose to do so, simply place a coffee filter or a piece of paper towel through the opening at the top of the mask. The filter must be refreshed in order to remain efficient. Check for moisture and discard if wet.
Please note: These types of masks are not intended to protect the wearer, but to protect against the unintended transmission -- in case you are an asymptomatic carrier of the corona virus. I protect you, you protect me.