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13 Aug 2016 . As Kathmandu's demand for anti-pollution face-masks grows, new products . oil and greater than 0.3 microns in size, much smaller than the PM2.5 microns, . Metro-mask, marketed as the Nepal's first high-tech anti-pollution mask, . those who can't afford the anti-pollution masks that are the real concern.
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23 Feb 2017 . “I use a cloth mask throughout the day, believing it would help,” she told . The results of a new study done in Nepal suggest that inexpensive cloth masks worn by . sizes of diluted diesel exhaust, which simulated real-world conditions. . particulate matter, PM2.5 PM less than 2.5 microns of Kathmandu.
29 Jan 2015 . Many people in Nepal's capital wear multicolored dust masks. . It's the thick grey yellow haze that swallows up downtown . She notes that the only real protection against black carbon is from an N99 or N95 masks that are .
Answer 1 of 7: I would like to know what kind of masks you guys have . Best to buy before coming he says, so I have more choice outside of Nepal and it will be cheaper. . It is better than nothing, but doesn't really help with pm2.5 issues.