In all seriousness, I bought the powered unit because I have a hard time breathing through regular filters. I have a respirator at work that I used to use when I changed out drums of two part foam. I’m glad that we got rid of that stuff. I worked hard to breathe through that thing.
The cool air flow feels good too. It also has replacement plastic lens covers that protect the main lens. When they get scratched or dirty, you peel them off and put on a new one. The entire unit is safety rated for impact and you can attach hearing protection to it. I really like it for wood turning.
Dave.