Traditional attus robes were worn by the Ainu on formal occasions. The fabric of attus robes is woven of elm (attus in Ainu) bark fiber, which is tailored into a single-layered robe with sleeves. The collar, cuffs, hem, and back are decorated with embroidery and extra cotton cloth, which display Ainu motifs. The entire process, from thread making to fabric weaving and robe finishing, is carried out by women. It is now seen as an artistic form in its own right.