Quote:
Originally Posted by margaretmattson
Not doubting what you say, you seem well informed. The cotton masks I have seen come with a pocket to put in a filter. Are the filters completely useless as well? Or, do they block, at the very least, a little better than wearing the mask without the filter?
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Since the cotton masks do not seal to your face, I would think that adding a "filter" (whatever that may be) is pretty much useless...