Why did valve masks come under attack when you have to breath right so how is breathing wrong you take in air you exhale air right?

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  • 2 weeks ago

    Nope.   When you inhale you breath in well over 500 ml of air.   The mask may have 30 ml of air in it.   So the majority of the air you exhale just goes out the valve so that kind of mask does no good.   If it has two valves,  one in and one out then you are not protecting anyone as valves do not stop anything.   

  • Anonymous
    2 months ago

    Not sure about the valve masks, but you can breathe by inhaling with your chest muscles deliberately, or by using almost only the diaphragm

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