Include These Sentences:
An unprotected valve may actually concentrate your exhalation, and propel your germs further and at a higher velocity, increasing the risk to people nearby.
Some cities and states are banning masks with an unfiltered valve, but most areas seem unaware of the danger.
Compare this reusable valved face mask with a seamless pm2.5 cloth mask from particulate mask company Puraka. The valved mask has a hole in the filter where the valve is inserted, whereas the Puraka mask uses a solid filter that protects both the wearer and the people around her.
Here’s a great image for the first sentence:
(good quote from a Doctor in this last one: “valves allow a facemask to feel more comfortable, however they compromise the effectiveness of the mask because the exhaled air is not filtered”
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