Something I've learned recently. Overcoats are most often worn with suits, which I guess is part of the idea. So they're designed with the idea that you'll have other pockets. An overcoat might have only the two hip pockets, which aren't that deep and don't have anything covering them. That makes an overcoat a less than great place to carry, say, an extra pen you might need. You gotta come up with a different plan.