Wavy hair:

Wavy hair is intermediate between fine straight and curly hair. On the individual level it is common in many fine straight-haired or curly-haired populations. Wavy hair exists in all colours, it is common among Europeans, except for Northeastern Europe, in North Africans, West Asians, Indians, South East Asian inland populations, Australian Aborigines, Polynesians, Ainu, as well as in specific Native American and Siberian populations.