This is a super deluxe, very high quality lifesize prop monster head of Lemnoc, the crustaceous alien mad scientist from the
"Phantom Family" episode of the classic TV series "Lost in Space". It's a large, slightly bigger than adult size mask, but since
it is an uncut display prop (no holes have been trimmed for vision or ventilation), you couldn't actually wear it unless you cut
the appropriate holes or slits in it.