T'anggŏn () is a type of Korean traditional headgear worn by men, which is put under a gat (formal hat), and worn over their topknot (sangtu). It is usually made of dyed horsehair or cow hair. Artisans who specialize in making t'anggŏn are called t'anggŏnjang.http://www.korea.net/kois/magazine/pictorialKoreaView.asp?Html_no=179
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See also Jeongjagwan Gat Manggeon Sangtu Hanbok
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