PAPUA NEW GUINEA SEPIK RIVER REGION CUSTOME. Woven dance costume from the Sepik River region in Papua New Guinea. These costumes, often described as masks, are made of rattan fiber and feature elaborate decorations such as feathers and woven rattan in various styles and colors. This particular costume has two faces, one on the chest and one on the head, and includes embellishments like cowrie shells, boar tusks, and maybe even feathers.