(Original post by B-Man.)
Needs gas to survive. That mask contains pipes which pump gas into him.
oh right okay. I just wiki'd it, I guess the film and the comic differ a bit? Film says it's some pain-killing gas he needs to function, comic says it's some gas which gave him his super strength, that he needs to have at all times.
Well there we go, educated on a batman villain.
They're saying it was a riot helmet now anyway. Wonder what his reasoning for doing this will be...