Smoke helmet reproduction.
You may need to size the mask down, the current size makes it a little bit too big, reducing 25% should be better (but check it first).
Epoxy the parts together 1 2 3 4 together
parts 5 and 7 are to be glued back to back (it's easier to glue the part number 7 to the helmet (flat face up) and then glue part 5 to it to get a good alignement