Long Mermaid Prom Dresses & Windsor Red Halter Satin Mermaid Long Prom Dress With Slit Red Mermaid Evening Gowns & Windsor Black Colette CL5284 Halter Formal Long Mermaid Prom Dress for $399.99. The Tristan dress exudes bold elegance with a sleek satin finish and a figure defining mermaid silhouette. This stunning red gown features a chic halter neckline that beautifully frames the shoulders and neck. The sleeveless design offers freedom of movement, while the lace up back ensures a perfect, adjustable fit for a personalized look. The dress effortlessly combines sophistication with a touch of allure, thanks to the daring side slit that adds a hint of drama as you walk. The sweep train trails gracefully behind, giving the gown an extra layer of glamour and creating an unforgettable entrance. Whether you're heading to a formal event or an evening celebration, this dress is a standout choice for both evening dresses and formal dresses. Details: Silhouette: Mermaid Fabric: Satin Color: Red Length: Sweep Train Neckline: Halter Sleeves: Sleeveless Back: Lace Up Back Embellishment: Split