A dudou is a traditional Chinese undergarment for babies and young children. It's kind of like a combination of a shirt and underwear. It's made from soft, comfortable fabric and has straps that go over the shoulders to hold it up.
The dudou is designed to keep the baby's bottom covered and dry, since babies can't control their bladders like adults can. It's also meant to be easy for parents to change the baby's diaper without having to take off all of their clothes.
Some dudous are very fancy and have embroidery or other decorations on them. They come in many different colors and patterns, so there's sure to be one that you like. Overall, dudous are a practical and cute choice for babies and young children in China.