Enza Costa Silk Rib Off the Shoulder Long Sleeve Top in Black. - size L (also in S, XS) Enza Costa Silk Rib Off the Shoulder Long Sleeve Top in Black. - size L (also in S, XS) 87% viscose 10% silk 3% lycra. Made in USA. Machine wash. Ribbed stretch fabric. Center seam at back. ENZA-WS921. SRS3698. 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