You may want to ditch that valve face mask: The pros and cons
10:30am PDT - May 9th, 2020 oakland - ABC NewsMostly used in construction settings and not by health care workers, valve masks are a type of N95 mask that with a one-way valve.
Mostly used in construction settings and not by health care workers, valve masks are a type of N95 mask that with a one-way valve.