Panties in American English (typically called knickers in British English) are a form of underwear worn by women. Panties are most often form-fitting, but may also be loose. Typical components include an elastic waistband, a crotch panel to cover the genital area (usually lined with absorbent material such as cotton), and a pair of leg openings that, like the waistband, are often made of elastic. Various materials are used, but are usually chosen to be breathable.