Enza Costa Supima Sleeveless U Tank in Black. - size L (also in S, XL, XS) Enza Costa Supima Sleeveless U Tank in Black. - size L (also in S, XL, XS) 100% pima cotton. Jersey fabric. Made in USA. ENZA-WS820. ISL3340. 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. Shop the latest in fashion from Enza Costa