Panties are clothes worn under other clothes, often next to the skin. they keep outer garments from being soiled by perspiration, urine, semen, faces, and other discharges; shape the body; and provide support for parts of it. In cold weather, panties sometimes are worn to provide additional warmth. Some panties are intended for erotic effect. If made of suitable material, some panties can serve as nightwear.

Or these ones...