STYLE NO: #RGSS16ST1015 - Free size, unisex style. - This is double collar shirt which is a key feature of hanbok (Korean traditional costumes). - Shoulder line go front, with an invisible button-down placket. - Fabrication is a high quality fine tencel cotton, silkly handfeel yet not too drapery. - Fabrication is soft and tender, wearer would feel comfy.