If you have never seen one of these hats, you have probably never been to South Africa.
This style of hat actually started with a style of hair done by the woman in South Africa. They would style their hair in a cone coming from the back of their head. Some were up to a metre long!
After contact with Europeans, this style developed into a removable hat. They would include human hair into the weaving of the hat so that it still remained an extension of the hat-wearer's body. See more African headdresses here.