The vest for junior middle school girls is a kind of vest underwear suitable for students. The front is made of cotton and the back is made of mesh. The quilt of the girl's vest is buckled and easy to adjust. There is a sponge on the chest of the vest, but you can take it at will. It is a very affordable dual-purpose underwear product. Junior high school girls' small vests are designed reasonably, which is very suitable for developing female students and has a good protective effect on students' chest development, especially during sports. Due to the design of cotton pads in students' coats and vests, adult women can also wear them, which can be used to match clothes and can also be worn alone when doing sports. The most important thing for girls' vests is to play a protective role, but the shape is not important for adults, and the texture is best made of pure cotton, so as to avoid the blockage of breast ducts by finer artificial fibers in the future and affect breastfeeding. So how to choose the vest for junior high school girls? What kind of vest should I wear? Junior high school girls' small vest budding stage (1) Age: 9- 1 1 year-old Development characteristics: breasts and nipples are raised, shaped like hills, and areola appears. At this time, the mammary gland proliferates, forming a nucleus, and there are nodules or small lumps on the touch. Underwear selection: soft cotton (comfortable, natural, sweat-absorbing and breathable) and good elasticity (reducing the friction on breasts during exercise). Underwear style: The underwear selection at this stage is mainly vest style. Junior high school girls' waistcoats in the second stage are 12- 13 years old. Developmental characteristics: the breast has obviously protruded from the chest, and the nipple is further raised. Underwear selection: upper bust-lower bust