This was a good link to read https://sawmillcreek.org/showthread....-Airshield-Pro.
It was posted in 2016. I want to upgrade my dust protection and there a lot of options. The first is a power respirator such as Trend or Power Cap. 3M Versa flow is another, but unsure if the added $ provides more. I don’t believe Axminister can ship theirs to the US anymore. For non power there is the Rasp-O-Rator, but think snorkeling with a nose clip. The 3M Ultimate FX Full Facepiece seems to be a good choice also and looks more comfortable.
What are you using and recommend?