A watch cap is worth it's weight in gold! I drive a tow truck in the evenings and on weekends for a friend who has a body shop. I get called out at all hours of the night. I used to wear Carhart type overalls and a baseball cap. I have found that if I throw on a watch cap instead of the baseball cap, I can usually get by in just jeans and a jacket. Granted, I don't think I've ever had a night at -20 but it is often below 0, and for most incidents, I can get on scene and have a car loaded in 10-15 minutes. If I have to recover a car (where I am out of the truck for a longer period of time) then I'Il throw on the Carharts but I still wear the watch cap.

Now I carry a watch cap to work with me all the time in the winter months.