Cold-weather ear band for the fierce and funny here in Minnesota and nearby northern "Heartland" States. Expression utilized when the wind chill dips into below-Siberian-winter levels.
Commonly shouted about in this manner: "It's cold as hell outside!! Don't forget to put on your ear brassiere!" (Which was a typical quote from this writer's salty and sassy Scorpio mother, whose pseudonym would rightly be: LadyDayFan.)