Official Trick or Treat. Nightmare on Elm Street Part 4 Deluxe Freddy Latex Mask with Hat. Trick or Treat Studios and Warner Bros. Pictures are 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 and behind the scenes photographs, this is the ultimate Freddy Krueger Mask 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. In addition to this incredible mask, this version of the mask comes with a beautiful replica of the Fedora Hat worn by Freddy Krueger in A Nightmare on Elm Street 4: The Dream Master.