Leggings are any of several sorts of fitted clothing to cover the legs. Originally leggings were two separate garments, one for each leg. In contemporary usage, leggings refers to tight, form-fitting trousers that extend from the waist to the ankles; in the United States, they are sometimes referred to as tights (although the word tights is often used to refer to opaque pantyhose). Modern leggings are typically made from a blend of lycra, and either nylon, cotton, or a cotton-polyester blend. However, leggings can also be made from wool, silk, and various synthetic fabrics as well.