Culottes
Culottes are a form of split skirt. They are usually made full or calf length, and consist of a pair of loose, flowing trousers which strongly resemble a skirt until the wearer engages in vigorous physical activity. The shorter version is a skort, a pair of shorts with a flap of fabric in the front that turns them into a more modest skirt. Many active women who believe in wearing modest clothing for religious reasons wear culottes, as they allow a full range of movement without the potential for exposure.
In the 1960s, culottes became fashionable, and they were known as hostess pajamas. These trousers were a little more slimly cut, so they more strongly resembled pants, and they were often sewn in brightly patterned fabric with matching tops. Usually, culottes were sold in a set with the top, and were made from fabrics like silk or rayon, which were soft, shiny, and flowing.