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PhilipOtt
People with a lung disease and the associated breathing difficulties, for example, benefit from this mask. Especially in the current situation of the increasingly spreading corona virus, this protective mask is a good protection for yourself not to catch this virus through the air.
Once again I fell down the martial arts rabbit hole and am plumbing the murky depths of the internet's various martial arts and fighting crafts echo chambers.
If you're not actively involved and only get up to speed every few years or so, you can see the tide of public opinion flapping worse than my dong while I'm skipping naked down a hallway.