I've mailed my parents a couple of masks with a piece of vacuum cleaner filter between two pieces of cotton but I definitely had the problem with exhalations fogging my glasses. On the other hand I have that with n95s, too, which is why I have a big full face respirator that I wear for serious tasks like removing old carpet, etc. And now perhaps grocery trips as well, good grief.
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I've mailed my parents a couple of masks with a piece of vacuum cleaner filter between two pieces of cotton but I definitely had the problem with exhalations fogging my glasses. On the other hand I have that with n95s, too, which is why I have a big full face respirator that I wear for serious tasks like removing old carpet, etc. And now perhaps grocery trips as well, good grief.