The extremely stylized chimpanzee masks are called mwisi gwa so’o a term that alludes to the “spirit-invested object of the chimpanzee human” that inhabits the mask. The mwisi gwa so’o masqueraders wear a costume of animal skin, barkcloth and the hair of colobus monkeys. Their raucous dances, performed at funeral and memorial services, reflect Hemba ideas about death and social chaos and stand in diametrical opposition to the otherwise ordered world of the living. Small masks, such as this, are commonly worn on belts. (from African Masks from the Barbier-Mueller Collection by Hahner-Herzog, Kecskesi and Vajda.)