I love my Cambridge masks, and have bought some more. I originally bought them for my family's plane flights. But now I use them for Covid-19.
Cambridge masks are adjustable, and more comfortable than other masks I've tried, such as the regular cotton and the disposable masks. But I keep returning to my Cambridge masks.
Here's what's cool about them in the days of Coivd: you can deactivate the valve for the pandemic. https://cambridgemask.com/sh…/accessories/valve-deactivator/
The reason for the temporary deactivation is that while these masks are excellent in every way, including plane flights and pollution, the valve, meant for the wearer's comfort, is not approved by the CDC for source control.
This means that although the valve allows for maximum comfort to the wearer, it allows a little too much exhalation out into the air. It protects you, but needs an alteration to protect others.
Here's what you can do to make your Cambridge mask perfect for Covid: Valve Deactivator