Re: DC's New 52: Reviews and Discussion (Spoilers welcolme and likely)
Well would his entire
suit be made of kevlar? What would be the point of making the ornamental bat-ears out of kevlar? Maybe he saw the "value" in using the ears in a offensive way and made them out of sterner stuff. Heck, we see in the Nolan movies that the ears are out of a hard material as they have an actual function in the suit.
Just because it's futuristic doesn't mean it's practical.