Where do I see how long my gas mask can hold?

I’d like to know how much time I have on my gas mask on the surface.

My character’s breathing frequency changes sometimes. Is that an indicator that I should change my gas mask?

Also, should I change my gas mask for any other reason than if it becomes damaged, like, glass broken from an attack?

Answer

There is clear indication of that on Artyom’s watch.

On PC, you have to press T to look at it. On Xbox 360 – Left Bumper.

Also, should I change my gas mask for
any other reason than if it becomes
damaged, like, glass broken from an
attack?

AFAIK, new mask always comes with the filter at 100%, so you could change just for that.

Attribution
Source : Link , Question Author : DrFish , Answer Author : a cat

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