Find COSTARELLOS Hemera Crystal-beaded Gown on Editorialist. The Costarellos Hemera Gown features a strapless, off-the-shoulder neckline with a draped tulle overlay. The gown is made from a beaded fabric that cascades over a sheath silhouette. This gown includes a detachable train that can be worn for an ethereal look or removed for a more streamlined silhouette. The gown is made from a blend of polyester, nylon, and polyamide.