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The Water Cooler
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Face Mask, Now We Know
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<blockquote data-quote="crrcboatz" data-source="post: 3532550" data-attributes="member: 32702"><p>Our masks have those breathing and exhaling valves and the DO filter both directions. Our masks have 3 layers of cloth,a replaceable 3 layer filter that contains a charcoal filter and 2 different types of paper then 2 more layers of cloth. The valve forces all layers to be filtered before and after breathing. Our Dr recommended them. We replace the filters about every ten days. They were expensive but we both face respiratory challenges so the cost was worth it</p></blockquote><p></p>
[QUOTE="crrcboatz, post: 3532550, member: 32702"] Our masks have those breathing and exhaling valves and the DO filter both directions. Our masks have 3 layers of cloth,a replaceable 3 layer filter that contains a charcoal filter and 2 different types of paper then 2 more layers of cloth. The valve forces all layers to be filtered before and after breathing. Our Dr recommended them. We replace the filters about every ten days. They were expensive but we both face respiratory challenges so the cost was worth it [/QUOTE]
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