Fire escape hoods: Providing a person with clean, filtered air in a smoke-filled environment.

https://www.london-fire.gov.uk/about-us/services-and-facilities/vehicles-and-equipment/fire-escape-hoods/

london firefighters bring these into a bld when making rescues at a bld fire

no FD in the USA has any of these afaik

they might cost $100 iirc