There's no modern standard here. Cloaks are unusual, especially on men. Which is not to say you shouldn't do it, but that you should understand that you're in uncharted territory, developing an aesthetic that will be entirely your own. If that's sweatpants, tights, pleated cords, orange denim... you're on your own here.

Idk. Try corduroy and tweed. That could give a rustic effect.