I bought two of these when we were all on alert. Comfortable and high quality.
Has a disposable carbon filter in the front, the remainder is washable. Please search the best seller.
https://www.ebay.com.au/itm/AU-Reusa...4AAOSwD5NfEsfN
https://www.ebay.com.au/itm/2Pcs-MAS...0AAOSwPexfLkHs
Good quality disposable:
https://www.ebay.com.au/itm/KN95-Fac...Cclp%3A2334524
Given that this may 'extend a while' ....