Exhibit A: A page on which Reynir takes off his own coat, showing he has a normal shirt under it. On the current cover, that layer is a tunic with an opening running down the front (a trait which is shared with the dreamspace counterpart of that layer).
Exhibit B: Reynir's real-life own coat is usually worn closed with the belt over it and not that much longer than the military jacket. The fact that it's both open enough to give a clear picture of what's underneath it and significantly longer than the military jacket causes it to resemble its dreamspace counterpart as well from my point of view.
And I otherwise used the term "a combination" precisely because everything else does point to his real-world clothes, icluding the fact he's otherwise wearing his normal belt.
