Burgundy Long Mermaid Trumpet Prom Dresses With Ruffle Shoulder Formal Dresses Burgundy One Shoulder Trumpet Mermaid Long Formal Dresses With Slit Burgundy One Shoulder Mermaid Prom Dress with Stylish Split Bridelily Burgundy Long Mermaid Trumpet Prom Dresses With Ruffle Shoulder. This elegant one shoulder formal dress is sure to make a statement. With a flattering trumpet mermaid silhouette and a daring thigh high slit, this dress is perfect for any formal event. The slit adds a touch of sexiness while the one shoulder design adds a unique touch. Stand out in this stunning dress and feel confident all night long.