You'll need some materials like foam, fabric, and paint. Start by creating a basic shape with the foam and then cover it with the fabric. Use the paint to add details.
Well, first, get a good reference image of the Bane mask. Then, make a mold out of clay or something similar. From there, you can build the mask using materials like plastic or fiberglass and paint it to get the right look.
To make a comic book Bane mask, you could start with a cardboard base. Cut and shape it to the desired form, then add layers of papier-m芒ch茅 for strength. Finally, decorate it with paint and fake leather for that authentic touch.