Are Masks with Valves Less Effective? Share May 22, 2020 Dm4r Technology In an attempt to minimize the spread of COVID-19, wearing masks in public is becoming the new normal. Whether it’s a cloth mask or an N95 respirator, anything covering your mouth and nose will do—just as long as it doesn’t come with a valve. Read This Article on LifeSavvy › Source : Are Masks with Valves Less Effective?
