Rosie Assoulin's linen-blended "Bidi Bidi Bom Bom" cocktail dress is tailored with an asymmetric neckline adorned with a playful, layered ruffle sleeve.; One-shoulder neckline; Tiered long sleeve; Vented back; Sheath silhouette; Concealed side zip closure; Viscose/linen; Lining: Cotton; Dry clean; Imported