'Yem dao' (a pink blouse) is an indispensable part of Vietnamese woman's attire in the past. Although modern Vietnamese woman no longer wears this brassiere nowadays, 'yem dao' still appears in various traditional performance, as a symbol of seductiveness and femininity of the Vietnamese woman.

Some researchers think that “Yem dao” comes out in order to crown woman’s back which is considered as a beauty mark according to Vietnamese culture. Under traditional notions, a beautiful girl is the one having the back is really thin. The shape of “yem dao” might be changed over time. Moreover it was first found in the 12^th century during Ly’s dynasty.

In 18^th -19^th century, “yem dao” was a square crossing woman’s chest. An angle was cut to the neck and had two strings. Two pieces of wire were attached to two other two angles to fix it on the body. Affection colors told a lot about the owner: labors wore brown bra which was made of coarse cloth. Educated girls wore multi-colored, discreetly elegant bra. Older people preferred dark colors. “Yem dao” was usually in combination with a long blouse or shirt or worn with four-panel dress.