A baby doll is a short nightgown or negligee intended as nightwear, often with matching panties. It commonly consists of formed cups from which a loose-fitting skirt falls somewhere between the hips and the belly button. Baby dolls are very feminine and sexy. More so when they are made of sheer materials like lace and mesh. Certain styles such as peek-a-boos also add to their sexy element.

Sexy baby dolls are also made of stretch materials, fishnet, eyelet or chiffon. Of whatever material they are made of, their beauty comes from enhancements such as trims and ribbons, beads or lace. The cut also has a lot to do with its sexiness or conservatism. They usually come with matching panties or thongs. Some include a matching sheer jacket in a set.