Specifically, the mask helps deliver an anesthetic gas which numbs Bane's chronic pain enough that he's able to function. As Christopher Nolan explained to Rolling Stone (via Batman News): "Bane ...

It's revealed in "The Dark Knight Rises" that the mask Bane wears actually keeps severe pain under control for the supervillain. The famous quote, "No one cared who I was until I put on the mask ...

It has drawn comparisons to the mask worn by the villain Bane in “The Dark Knight Rises,” the 2012 film in the “Batman” series. It also has been compared to the one worn by Hannibal Lecter ...