When Dr. Sam Loomis first met a six-year-old Michael Myers, he was struck by the boy’s blank, pale, emotionless face, and… the blackest eyes – the Devil’s eyes. And that was before he even put on the mask.
The disturbing appearance of Michael in the original Halloween remains undiminished, despite its simplicity. He wears a dark-blue boiler suit and a modest Halloween mask, which in the fiction of the movie, he steals from a hardware store.
And it really was a Halloween mask, but one depicting William Shatner as Star Trek’s Captain Kirk.
The original Captain Kirk mask that was used as the basis for The Shape’s mask.
Source: IGN.com The Many Pale Faces of Halloween's Michael Myers