Are you also looking for a mask that is both safe and easy to breathe?
Then SOOMLAB Hyper Purifying Breathing Mask with Nano-fiber filter should be your pick.
Test results for breathability
Nano-fiber filter is much finer than electrostatic (Melt Brown) filter, which allows for higher filtration efficiency but better air-flow for easier breathing. You will immediately notice the difference when you try it on.
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