Filters for Cloth Masks
These are disposable filter inserts made from Filti face mask material. They are cut in a shape and size that fits into filter pockets of both the accordion style masks sold on this site and the more fitted style of face mask.
While they are technically sold as single use, much like disposable face masks they can be sterilized for re-use by heating them to 150º for 30 minutes in your oven. There is currently no solid information on how many times the filters can be sterilized and re-used effectively, so please use your best judgement when choosing to do this.