These face masks work pretty well, but since they are much more stiff compared to the cloth (surgical) masks, they don't seem to fit as well more gaps around the edges. I use masks to keep from inhaling pollen and dust when I'm cutting my lawn on a dry day.My wife is a teacher, and she uses these to simulate gas masks when the students do a WWI "trench warfare" exercise in the classroom. The masks work great for that. Thd kids color them green.
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