6 Reasons Why Tom Hardy's Bane Was So Perfect
#1 Hardy Acts With More Than His Mouth
Hardy's way of using facial expressions was the key element needed to convince Nolan that he would deliver a performance worthy of putting on the mask. Nolan needed an actor who was comfortable using their whole body, and Hardy was especially good at using his eyes to communicate emotions with passion.
The mask itself could have caused a big problem for Hardy. But he repeatedly said in interviews that he felt fine with a metal muzzle after his initial panic wore off.