Can Surgical Masks Help to Block Out PM2.5?

Yes! Based on scientific fit tests and particle penetration tests, surgical masks as cheap as 1 RMB (US$0.15) block between 60-90% of particles. That includes even the really small particles and even while a person is wearing it.

Click here to read more on relevant studies: https://smartairfilters.com/en/blog/surgical-masks-surprisingly-effective-pm2-5/

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