Jervis Tetch's top hat it was the top hat that Jervis Tetch used whenever he was dressed The hat was an addiction for him.
Whilst performing as a hypnotist, Jervis wore a top hat and suit for his acts, although he would continue to wear the hat outside of his profession.
Whilst imprisoned at Arkham, Jervis donned a newspaper hat to replace his confiscated one.
- In the DC Comics, The Mad Hatter has a love for headgear due to his obsession with Alice's Adventures in Wonderland. He uses the hats to contain his mind control technology in order to brainwash his victims.