Wrap up your nerves and get red carpet ready in X by NBD's So Anxious Gown. A halter neckline gives way to a slinky silhouette rendered in chic satin and finished with a full leg-baring slit.. Self: 100% polyContrast: 92% poly 8% elastane. Hand wash cold. Partially lined. Halter neck and side tie closure. Hidden side zipper closure. Brief lining with bottom snap button closure. XBYR-WD151. XND48 H17. With sexy silhouettes and daring cut-outs, X by NBD is the party girls go-to brand for the perfect dress. With lace overlay details, plunging necklines and sweet scalloped edges, X by NBD gives a modern makeover to cocktail dresses.