I know this was /s. But in the civilian market gas masks are called respirators, and lots of people use them in their work, including me.
You can turn one into a gas mask as such simply by changing the cartridges. FWIW the civilian masks are a whole lot more comfortable than that thing he's wearing.
“...gas masks are called respirators, and lots of people use them in their work, including me.”
Yes, I am a Chemical Engineer and worked in industry for some 40 years. We had them as a matter of course, for emergency use, and I have see a few occasions where we had to use them, either in emergency or as a caution.
And yes, of course the comment was a /s :)