If you’re in an area with dick-kicking cold winters, and you have to dress like an actual grown up to work, this 100% wool coat from Band Of Outsiders should do the trick of keeping your overpriced suit warm.  From Selectism:

Band of Outsiders polo coat features a double breasted four-button closure, two large flap pockets and one left breast pocket. Interior features the brands signature light blue and white stripe lining. 100% wool with cupra lining.

Although it has the tailored look in the back, it’s loose fitting and should serve as the perfect overcoat. 

You can get one here.  It’ll be $2,070.