Priestly costume is largely based on the clothes worn at the imperial court during the Heian period. It includes a tall, rounded hat known as an "eboshi", and black lacquered wooden clogs known as "asagutsu". The outer garment worn by a priest, usually colored black, red, or light blue, is the "hō", or the "ikan". A white silk version of the ikan, used for formal occasions, is known as the "saifuku". Another priestly robe is the "kariginu", which is modeled on heian-style hunting garments. Also part of standard priestly attire is a "hiōgi" fan, while during rituals, priests carry a flat piece of wood known as a "shaku". This costume is generally more ornate than the sombre garments worn by Japanese Buddhist monks.