79 kenner Alien Dome - Form Fitted to the head.
Reproduction  alien dome.
Dome is transparent clear plastic. Not a cast.
NOTE: It is a misconception that the original dome snapped on.
It just sits on top of the head. Hence why everyone lost them.
This is a custom form fitted dome that will stay on even when the figure is upside down
These are susceptible to heat, do not display for long periods of time in the sun.
Domes are not perfect and may  have slight imperfections.