So Couture Cap Sleeved Cut Out Neckline Dress. 70% Viscose 27% Nylon 3% Elastane. Split Vent. Peplum Waist. Concealed Zip. From the Pretty Dress Company this So Couture Cap Sleeved Cut Out Neckline Dress has an angled neckline with concealed zip on the reverse. The dress is a body con style with mini peplum waist and pencil skirt style with vented hem for ease of movement.