Now you can stylishly wear your certificate of insanity with pride with the help of this officially licensed The Joker Certified Insane Era 9Forty Adjustable Hat. This black Era 9Forty Adjustable Hat is made from polyester and features a "Certified Insane" patch from Arkham Asylum on the front with a rounded bill and adjustable snapback.

All the dependable characteristics of a high-quality Era Hat:

• The Era logo resting on the hats right side.
• The stitched taping crisscrossing the hats interior.
• The official Era tag, also inside the hat!
• This one-size-fits-most 9Forty hat features an adjustable snapback for a secure closure!
• Era sticker on top of the brim.