Lady's nighties are a type of clothing item that is typically worn by women. They are a form of lingerie, usually made of lightweight, sheer fabrics such as silk or chiffon. Negligees are a type of lady's nightie that is characterized by its loose-fitting, flowing silhouette and often features lace or other decorative details. Negligees are typically worn as sleepwear or loungewear, but can also be worn as outerwear in certain contexts.