It's not a hair hat. It looks like a brazilian blowout, which is a kind of perm that's really common around here.
http://en.wikipedia.org/wiki/Brazilian_hair_straightening
Brazilian hair straightening treatments (also called Breezilian Brazilian Keratin Treatment, BKT, Brazilian Blowout, Escova Progressiva, Keratin Cure or Keratin Straightening) are a method of temporarily straightening hair by sealing a liquid keratin and a preservative solution into the hair with a hair iron in the United States. It has been banned in several countries including Canada[1] and the European Union[2] due to high concentrations of regulated chemicals in them.











