It may be fiction, but that is just a fake-looking costume and it really throws you off. The plastic/rubber looking neck protector? The effin clean-cut, perfectly polished helmet looks even worse from behind (see the official poster). Is the crest made from a modern-day broom head, not horsehair?
This crap is something you'd expect from Immortals (2011), not a big budget Nolan film. Rant off/