KEVINSPARTAN117:

the helmet is going to be filled in you could not put on if it were hollowed out it would probably only fit on your fist

all i can say is, you must have an abnormally HUGE fist.  the helmet, on the outside, is big enough to fit, at least, a young person.  The inside however is how i said in my other post.  I know because i have seen it (in pictures, not in real life obviously).