Now you can stylishly wear your certificate of insanity with pride with the help of this officially licensed The Joker Certified Insane New Era 9Forty Adjustable Hat. This black New 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 New Era Hat:

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