Mermaid Trumpet Floor Length Prom Dresses Evening Gown Ball Gown Formal Gold Formal Dresses One Shoulder Trumpet Mermaid Long Formal Dresses With Slit Mermaid Trumpet Evening Gown Elegant Dress Formal Wedding Floor Gorgeous Mermaid Gold Long Sleeves High Slit Maxi Long Prom Dresses,13. 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.