I was reminiscing the other day about when I suffered from cold induced asthma last Century and wore a special mask to protect my respiratory system. It was a pretty blue color.
I strongly suspect that in todays world something like that would disappear within minutes of it being noticed. “They” don’t have nice stuff, why should you. Sides it mite be worff sumpinwhy not? there shells that have been fired, no one would make one with live ammo.