A sundress is an informal dress of any shape in a lightweight fabric, most commonly cotton, intended for summer wear. The dress is intended to be worn without a layering top, and the design must therefore cut a balance between modesty and allowing sun exposure. Lilly Pulitzer popularized the sundress in the 1960s.
The sundress provides a feminine look that may be lighter and more comfortable than a skirt and blouse, or another sort of dress. Modern styles can feature very low necklines and short hemlines, but more modest lengths and a variety of patterns are also widely available.