Tanggeon is a headgear for men of the Joseon Dynasty. It is a horsehair cap worn under a gat hat. The front is lower than the raised back, and served as a support for gat, which is worn over a topknot and a horsehair headband. These caps were made by weaving horsehair on a frame and then boiling the combined article. To solidify the shape, ink was applied to these caps and then dried in the sun. In the late Joseon Dynasty, tens of thousands of tanggeon caps were produced each year in Jeju Island alone, yet it was used significantly less following the ordinance prohibiting topknots in 1895. A master tanggeon craftsman has been designated as Intangible Cultural Property No. 67.