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Probably, but you can get that sort of FFM purpose built for scuba for the same money. [Hot Item] Diving Mask Scuba Diving Full Face Mask Full Face Black Rubber Dive MaskI was thinking that an adapter could be fabricated or 3D printed to replace the filer with inhalation/exhalation mushroom valves, mic, and/or 2nd stage regulator.
Probably, but you can get that sort of FFM purpose built for scuba for the same money.
Even if you add vents between the sections, adding an equalizing block looks tricky.
It's only the milky-colored parts that are silicone.