Dear OLD BOEING DRIVER:
Your question was valid. The response by the one poster was horrid. It seems to be deleted by now. Another post by PORTVALE was polite and answered the question.
I would not expect someone who flys for one airline to know what is used at another airline. BUT I DO EXPECT REASONABLE QUESTIONS asked nicely to be answered and not shot down.
IF someone has flown 4 different types of jets, and not happened to fly an airbus 320 owned by germanwings, it is a fine question.
We have fleets of planes, some have FULL FACE MASK, others have oxygen masks and goggles. ( I prefer the masks and goggles).
IF one pilot left the flight deck for any reason and the OTHER pilot was not on oxygen and something happened, OOOPS, BAM.
It is easier to go on oxygen with just a mask. What are the european regulations about oxygen and one pilot leaving cockpit?