This doctor wears a 3M respirator and 7093 filters. These are mainly used for industrial settings but good to know they are also useful for Covid19 : PandemicPreps
3m respirator filters All products are discounted, Cheaper Than Retail Price, Free Delivery & Returns OFF 78%
3M 5935 P3R Particulate Pre-Filter, Pair, Pack of 10 (B008OHMNQK) | Amazon price tracker / tracking, Amazon price history charts, Amazon price watches, Amazon price drop alerts | camelcamelcamel.com
Protective covers for 3M 6035 filters by Ksantor - Thingiverse