I'm sure somewhere in the vast recesses of the Combine someone has already answered this, but how exactly do the breath masks work? Do they only support life for six hours? How do you install replacement filters? Do they allow water terrain to be crossed? Any help is appreciated.
Stephanie, as far as I'm aware, the proper operation requires you to have all pieces. If that's the case and that's not how it's functioning, it needs to be reported as a bug instead of suggesting people abuse it.