Those face masks with breathing valves? They aren't effective, doctors say Some mask mandates banned the use of masks with breathing valves, because they don't stop the spread of coronavirus. yahoo.com

Heads up, folks. Older Vogmasks may be like this (however, it seems they are selling non-valved masks now).

The valve is supposed to make it easier to breathe out, but that air you breathe out is unfiltered and could put others at risk. The design was great for dealing with air quality problems and allergies, not so much for preventing spread of COVID.

You can cover it with tape or another layer of cloth to mitigate this issue!