Enza Costa Rib Sleeveless Turtleneck Sweater in Black. - size M (also in XL, XS) Enza Costa Rib Sleeveless Turtleneck Sweater in Black. - size M (also in XL, XS) 85% wool 9% cashmere 4% nylon 2% spandex. Made in China. Hand wash. Lightweight ribbed knit fabric with turtleneck styling. ENZA-WS1138. WCKS3925. 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