I've seen street cops all over Asia wearing them for years. The pollution's so bad in Bangkok, Beijing, HK…, their masks are black around their nostrils. If I have to stand in traffic all day I'd wear one.
I've seen street cops all over Asia wearing them for years. The pollution's so bad in Bangkok, Beijing, HK…, their masks are black around their nostrils. If I have to stand in traffic all day I'd wear one.