Oxygen mask (for high altitude)?

[Matty]

Hello,

I tried to see how high I could fly with the F15, and after 33000 feet I lost my (ingame) conscious due to oxygen-depravation.

 

Is there a mask I can put on or increase oxygen level in the cockpit?

[104th_Maverick]

after 33000 feet I lost my (ingame) conscious due to oxygen-depravation.

 

 

This is not modelled sir, it must have been something else!