3 ms·
Be aware many of those masks in the CDC list have one-way valves that cause exhalations to be unfiltered. If the wearer is infectious, it doesn't protect peopl
by imglorp 6y ago
Be aware many of those masks in the CDC list have one-way valves that cause exhalations to be unfiltered.
If the wearer is infectious, it doesn't protect people they encounter.
- onecommentman 6y agoYou can close those valves with a simple “hack”. The N95 woodworker mask I have has a plastic guard over the valve. Cut the guard and use an adhesive (I use Sugru) to close the valve. Ugly but effective, and visibly shows the valve has been shut...