|Package Dimensions||14.2 x 12.9 x 7.8 cm; 100 Grams|
|Item Weight||100 g|
HOMWE PM2.5 Activated Carbon Filter Mouth Cover Filters Breathing Insert Protective Filter for Kids Children Students,Activated Carbon Filter Replaceable Anti Haze Filter Paper (100pcs)
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I tested these by walking among a bunch of smokers. From 15 feet away, without the mask, I got a strong whiff of the tobacco smoke, but with the mask on I couldn't smell it at all even at very close quarters. I did the same test on smokey days (lots of those this summer) with the same result. They work. They're also easy to breathe through. Easier than the N95s.
NOTE: These filters ship with no instructions for use. Some research indicates they are probably good for a week or two of off-and-on use. Less if you're wearing them for eight hours a day. I kind of figure as long as they block the smell of smoke they're okay, but they're cheap enough to change out fairly regularly.
Also, there is a right side and a wrong side to the masks, which isn't explained because no instructions. You need to place the filter with the PM2.5 label facing toward you.
I like these things. Combined with my washable cloth face mask, they do the job. I'll probably keep wearing them even after the 2020 nastiness goes away.
Pros: Thick, dense, does reduce ambient smells.
Cons: Too thick or dense and it makes air movement through filter too hard so air seems to go around a lot. Measure first.
Suggestions for manufacturers: get airflow testing. Offer larger sizes for bigger masks.