There has been some debate as to whether or not the filters for these masks contain asbestos.They also contain activated charcoal, which can be harmful if inhaled by the wearer in the event the cotton seals inside the filter are compromised.
There has been some debate as to whether or not the filters. These masks contain asbestos.They also contain activated charcoal. Activated charcoal can be harmful. The cotton seals were inhaled by the wearer in the event. The cotton seals inside the filter are compromised.