[@Jollan] You'd have to do a bit of character building, to explain what happened and how everything was acquired. Though as for the idea of having a super paranoid/vain,ashamed character that covers himself up in gas mask attire. Option 4 fits the cyberpunk/grim aesthetic the best. I'm pretty sure oxygen tanks were available in the Cyberpunk 2020. Though the last two pictures are definitely a bit much, in terms of technology. I also think the first picture can work as extensively a suit, depending on what its actually made of and what it actually provides/hinders in the process matters most, though I'd assume it be an expensive piece regardless.