No more visible panty lines: Wearing a thong underneath such dresses will help you avoid those.
It is also used as a descriptive term in other types of garment, such as a bodysuit, bodystocking, leotard, or one-piece swimsuit, with the meaning "thong-backed".
The back of the garment typically consists of a thin waistband and a thin strip of material, designed to be worn between the buttocks, that connects the middle of the waistband with the bottom front of the garment.
Thongs are almost always designed to cover the genitals, anus, and perineum and leave part or most of the buttocks uncovered.
The thong typically resembles a bikini bottom, but at the back the material is reduced to a minimum.
