Lots of options out there: Outdoor Research, Duluth Trading, Army wool watch cap, Swedish military cap, etc. I mix and match but I haven't had luck with Stormy Kromer's. The new style isn't the same as the old and the "ear flaps" are practically worthless to me. BTW, the Kuiu cap certainly isn't the only sub-zero worthy cap out there. I've got a waxed cotton Mad Bomber that I can't wear above 5°F or it's just too warm and I suspect the Filson Double Mackinaw caps are the same.
