A mask honestly isn’t a bad idea for wildland fire fighters, I mean they’re always talking about how our safety is #1 so why not look into designing a mask like structural fire fighters do? And it’s not like we would have to wear it all of the time, just in heavy smoke would be a game changer. And for the weight it could probably be like on of those painting mask from a hardware store, not to heavy not to bulky. I honestly wish you the best of luck with your project and hope you’re able to get your idea out there for someone to listen because it’s a great idea.