The reason why they wear masks is not to hide their identity, but to look cool. J-Dog stated in an interview that they came up with their masks because "they didn't sound like anyone else, so why would they wanna look like anyone else?" Each member's mask has its own design. For each studio album, the masks are updated. Touring members of the band do not wear masks.
They often wear masks with cut out mouths when performing live so they can be heard easier. After performing 3-4 songs, they will take their masks off and continue the show unmasked.