Enza Costa Supima Rib Sheath Tank in White. Size L, S, XL, XS. 90% supima cotton 10% spandex. Made in USA. Machine wash. ENZA-WS1178. Designed to transform everyday basics into luxury essentials, Enza Costa's unique brand of minimalist, modern clothing is crafted with featherweight blends of sumptuous supima cotton, cashmere and silk.