These face coverings, often called altitude or elevation masks, are training tools that claim to come with some benefits, like improving lung capacity and oxygen efficiency by restricting your ...

ATLANTA — The worst-case scenarios kept coming: lavatory fires, turbulence that propelled oxygen masks from the ceiling, baby ...

So I asked him about it. What he was wearing was an ETM, or elevation training mask: a device that restricts oxygen consumption while exercising. These masks are meant to simulate the effects of ...

The oxygen masks were deployed only as a precautionary ... With safety in mind the crew followed their training and done an amazing job ...