My headblade hoodie is coming in handy. I don't have to wear a hat, but if the AC is still turned on in the restaurant, despite 20 degrees outside, I can pull up the hood. also use it at work when it has not warmed up yet for the day. Office is on an outside wall with a large thermopane window. It feels cold until about 11 AM on colder days. Wear the hoodie.
As a bonus, someone asks, "What's a headblade?"