There's little to the G-string panty. Like the thong, there's no rear coverage, and this style also provides little up front, where it forms a T shape of fabric. The front and back pieces attach directly to the waistband.
When to wear them: To your next hot date? Because thongs and even boy shorts often provide a seamless look underneath clothes, it's rarely necessary to require a G-string.
Cosabella Never Say Never Skimpie G-String ($19)