A "G string" is a type of women's underwear that features a very narrow back, leaving the buttocks mostly exposed. It is designed to minimize visible panty lines when worn under tight-fitting clothing. The front typically has a small triangular piece of fabric, while the back consists of a thin strip of material. G strings are often made from various fabrics, including cotton, lace, or synthetic materials, and come in different styles and colors. They are popular in lingerie collections and are sometimes worn for comfort or aesthetic reasons, especially in settings like dance or fitness where minimal coverage is preferred.