Fancy, high-end nightgowns are referred to by several specialized terms depending on their specific cut, fabric, and design features, including negligees, chemises, slips, and peignoirs. A negligee typically denotes a sheer, alluring gown made of delicate fabrics like silk or satin, whereas a chemise is a loose-fitting, sleeveless nightgown often featuring delicate lace trim. A peignoir refers to a long, glamorous outer robe worn over a matching nightgown, historically associated with luxury and elegance in sleepwear fashion.