Only Hearts So Fine Low Back Thong Bodysuit in Nude. - size M (also in ) Only Hearts So Fine Low Back Thong Bodysuit in Nude. - size M (also in ) 94% rayon 6% lycra. Hand wash cold. Adjustable shoulder straps. Bottom snap button closure. ONLY-WI830. 8569. 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.