The greatest movie ever made, The Thing from Another World, not only introduced me to vegetation made horror monsters, but also to the winter aviator caps. A fine invention of modern man that simply wraps wool or fur around your head to keep the heat in, the winter aviator cap is the perfect cap addition to your arsenal if you want that old school Steve Canyon look.
Barneys Coop has a fine selection from Crown Cap. Made from shearling wool, these multi colored check caps lock in via their leather chin straps. If you want to play in the cold, you might as well do it right.