2013 Jan 16 The Mask Factor: Breathing Easy for Cheap
Before you choke down another lungful of particulate-smattered air, let’s run through the facts: 1) You can’t bring yourself to drop thousands of kuai on an air purifier, and 2) even if you could, you wouldn’t want to lug one of those gigantors home with you when you finally left Beijing. Masks are a cheaper, much more portable way to protect ourselves from Beijing’s “fog,” whether you bike, walk, bus or subway to work and play.
* if using one mask every five days
** three-year mask-life, filters replaced every two weeks as recommended
*** five-year mask-life, filters replaced every two months as recommended
With the exception of the cotton one, all masks listed here are at least 94% effective at filtering PM2.5 particles, though improper fit and air leakage can bring that percentage down in real-world situations.
This article originally appeared on page 42 in the July issue of the Beijinger.