I like his … bel t? Those dangly stripey pajamas???
He’s a fashion icon, that’s for sure (what’s funny is that this outfit doesn’t line up with his sprite, maybe it’s supposed to be his promoted art?). This one is more similar to what he’s wearing now but it’s not as enjoyable so I put up the other one instead:
I think he’s wearing skin-tone hosen but honestly given the other fashion choices in this game I’m really not willing to bet on it.