In the Songye language, a mask is a kifwebe: this term has been given to masks representing spirits and characterized by striations. Depending on the region, it may be dark with white strips, or the reverse. The kifwebe masks embodied supernatural forces. The kifwebe society used them to ward off disaster or any threat. The masks, supplemented by a woven costume and a long beard of raffia bast, dance at various ceremonies. They were worn by men who act as police at the behest of a ruler, or to intimidate the enemy. This mask is feminine because it has no crest on its forehead. Mask, colors, and costume all have symbolic meaning. The dancer who wears the female mask displays gentle and controlled movements and is assumed to be associated with reproduction ceremonies. The use of white on the mask symbolizes positive concepts such as purity and peace, the moon and light. Female masks essentially reflect positive forces and appear principally in dances held at night, such as during lunar ceremonies and at the investiture or death of a ruler. The mask had also the capacity to heal by means of the supernatural force it was supposed to incorporate.