Van Yen district has the largest number of Dao and Dao people residing in comparison with other localities in Yen Bai province. The costumes of each Dao industry have a clear difference and that is also the basis for naming the Dao industry.
For example, the name of the branch of Dao or Man Thanh Y is based on the dominant blue characteristic of clothing. The sector of Dao is based on the characteristics of women's pants sewn tightly to the thighs, calves and leggings. For the Dao people in Van Yen district, most of them belong to the Dao Dai Ban branch, but women's costumes are accented by the red colors of the fabric or yarn on the black cloth background, so it is also known as Red Dao. Particularly with the costume of the Red Dao bride, just the hat also accounted for more than half of the red in the overall costume.

The structure of the traditional costume of the Red Dao people in Van Yen, for men is not much different from the costumes of men in the Dao industry as well as the costumes of men of some other ethnic groups. Red Dao men often wear berets or long scarves like a wide-brimmed hat. indigo jacket is sewn in a curled neck, a long dress close to the buttocks, a straight garment with buttoned upside down from the chest to the abdomen, behind the back is a patterned pattern charm against the attack of wild animals , the devil harms from behind. Another type of shirt is sewn a little short over the waist, flaps buttoned upside down from the armpits. Men's pants are black, loose-fitting, crumpled pants close to the ankles and waistband drawstring of linen or hemp.

 Women's clothing is usually more elaborate and includes parts: scarf, shirt, belt, pants, leggings. The towel is a fairly long black bandage, and when it is tangled, one end is applied to the hair, the other end is wrapped around the end of the tower, then the tail ends over the top of the head, letting it fall across the back. women's dresses are usually long and close to the buttocks and the neck is also lined with red patterned fabrics, which look very nice and the right side is the inside, with buttons to click on the inside of the outer flap (left flap) and pull the flap left and right click on buttons along the lower right flank. The two sides of the collar are usually attached red beams extending to the belly. On the back of the women's shirt, there is also an array of patterns in the shape of a charm.
The red Dao women's pants are machine-style with a wide, broad but sloping pants, tapered down to the bear and pants just close to the ankles, very big pants made of a patterned bandage and Legs wrapped with leggings. The waistband is tied tightly to the waist by the fabric belt and continues to attach another band with many colored belts to release long tassels down the thigh to enhance the showy appearance of the outfit. Along with the beauty of wearing this outfit, the appearance of the Red Dao women is greatly enhanced by the jewelry such as large silver necklaces and many silver vestiges.
According to ethnographic studies, the fact that the Dao in general and the Red Dao in particular, on costumes often have many colors because it is associated with the story of the General Ban Ho had to transform into a dragon with a dragon. iridescent to break into the castle to kill Cao King and save Ban King's country from destruction. Therefore, Ban Vuong taught the offspring of the Dao later to wear colorful clothes to thank General Ban Ho.

 Studies on traditional costumes of the Red Dao people also show that the costumes of the Red Dao people ensure both pragmatic but also deeply cultural nuance. Loose-fitting men's clothing is suitable to the specific characteristics of climbing, cutting trees, hunting, etc., often requiring quick and strong movement. Women's clothing has many colors and tight fitting into the body to enhance the beauty and physical attractiveness of women. At the same time, this style of clothing prevents dust when making upland, limiting the climate, cold weather, moisture from entering the body. Leggings work against cold, prevent mosquitoes, squeeze, hard, sharp objects to hurt the shin, especially it limits the risk of snakebites.