Not completely windstopper
This hat is warm like others have said. THe only thing I wish they would do different is place windstopper thruout the hat. In essence, the ears/ ear band is windstopper but the colored part is not. So wind goes right thru the part that is not windstopper. The top of your head is completely exposed to the wind. If you want a completely windproof hat with ear flaps, look elsewhere.