From Trick or Treat Studio. Trick or Treat Studios is proud to present the officially licensed A Nightmare on Elm Street 4: The Dream Master - Deluxe Freddy Krueger Mask with Fedora Hat. Based on hundreds of screen images and behind the scenes photographs from Wes Craven's, A Nightmare on Elm Street 4: The Dream Master, every detail of Freddy, as played by the incredible Robert Englund, is present in this mask, including a beautiful replica of the Fedora Hat worn by Freddy in the film.