Nothings written in stone and I'm sure I'm going to build upon his design in the future but this is basically it.

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He has a tiny bit of gut and garments typically consist of Burgundy or Red wraps around his forearms and legs and/ or dark gray shorts and underwear

Being the artist I am it was hard to not include all of Auron's anatomy - but at the same time (if needed) each artist will interpret it how they see fit anyway