The warmest hat I've ever owned was an Elmer Fudd type with fur ear flaps that folded up above my ears. After an owl came after it one morning and about causing me to lose my bowels and jump out of the stand, I decided wearing that hat in a climber wasn't a good idea anymore, no matter how cold it was. He was headed straight for my head but when I saw him at about 10 yards away and threw my hands up, he cut away. I'll never know who got scared more, me or the owl.