Masks don't stop most droplets at all or shorten their distance of travel, they just redirect them out the sides of the mask where they still take their place in the building's airflow and deposit on surfaces. There are several peer reviewed publications over the past 18 months that demonstrate this. Anything less than a properly fit tested N95 on a clean shaven individual who is properly trained to use it is completely pointless.
Masks don't stop most droplets at all or shorten their distance of travel, they just redirect them out the sides of the mask where they still take their place in the building's airflow and deposit on surfaces. There are several peer reviewed publications over the past 18 months that demonstrate this. Anything less than a properly fit tested N95 on a clean shaven individual who is properly trained to use it is completely pointless.