Panties, or knickers for those places speaking English outside of North America, are the articles of clothing worn as underwear by females. Specifically the garment covering the genitals. The types of materials and cuts are various and have changed dramatically. The panties girls wear today are not your granny's panties. They have become smaller and more to the point, often with the sole purpose to provoke those thoughts of sexual interaction.
Some enjoyable examples are; silk or satin thongs, tiny G-strings, lace bootyshorts, boyshorts w\ flirtatious print, and even the regular cotton hipsters\ low rise bikini briefs.