They look like they are wearing Russian type fur hats. but i'm struggling to think of a movie that has people wearing those... Planes, Trains and Automobiles maybe.
I really like the silhouette created by the hat, sleeves, and clothing around the ankles. It reminds me of a Don Bluth or similar animation style, but not too cartoony.
Prop/sometimes VFX/Soon to be Vehicle artist at Volition. I am a man of many hats. There are a couple of other polycounters here but I'll let them out themselves.