Only Hearts x REVOLVE G String in White. - size L (also in M) Only Hearts x REVOLVE G String in White. - size L (also in M) 88% nylon 12% spandex. Hand wash cold. Made in USA. ONLY-WI991. 51744. Since 1978, Only Hearts has offered romantics the best in fashionable lingerie, or what founder Helena Stuart calls inner outerwear. The collection features camis, bras, and slips easily layered under dresses and tops, but also cute enough to wear alone. Over the years, the line has evolved to feature not only undergarments, but undergarment-inspired, ready-to-wear styles.