some cheap kf94 can’t filter anything much. Some made in china one are quite bad. Get HSA one better. Try air plus or MaskSafe. Both very comfortable. If not get the made in Korea kf 94. Proper n95 is the best. Harder and expensive to get but good for high risk area. N100 also can. But the n95 up are very uncomfortable to wear long hours leh
KF94 - easier to buy a legit one compared to KN95. Great fit and mostly comfy for long hours wearing.
posted many videos testing various mask filtration capabilities. Maybe you can ssrr his post.
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