Review on Activated Replaceable Reusable Bandanas Breathing by Brandon Addison

These are great masks. I just want mask testers to test one of these as the filter closes the valve and reduces or eliminates the amount of particles expelled on exhalation. They don't look like the ones they show you in text messages where there is a hole in the filter and the valve stays open. These valves are closed not only by the filter, but also by the inner layer of the mask and the filter shell, reducing the risk of particle ingress and lowering the temperature.