How Long Do Air Pollution Masks Last?

There’s good data showing that masks (including surgical masks) really can stop pollution and even have demonstrated physiological benefits. Masks work. But one place data is lacking is for air pollution mask lifespan. Just how long do air pollution masks really last?     Really Just One Day?   I frequently … Read more

How Much Pollution Do We Breathe Every Day?

How much pollution do we actually breathe in every day? Are masks or air purifiers more benefiting to our health? Do we really need both? The answer to this comes down to how and where we are spending most of our time every day.  There are two possible theories: masks might … Read more

Shanghai Technical Inspection Bureau Mask Tests

It’s tough to get good mask data on a wide range of consumer masks. I’ve posted some of my own test data and test data from Dr. Saint Cyr. But another great source of even more mask tests comes from the Shanghai Municipal Bureau of Quality and Technical Supervision. I’ve linked to … Read more

Poor Man’s Fit Test

Since mask fit-test machines cost $10,000, many people need a simpler, practical way to check that their mask is sealing properly on their face. In those cases, a simple four-step “poor man’s fit test” will help people check the fit of their mask and find leaks.     I was … Read more

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