Mermaid Formal Dresses & Windsor Long Mermaid Dresses & Windsor Mermaid Formal Dresses & Windsor High Side Slit Dresses & Windsor. Special Occasion Make an entrance for the ages in a formal dress that wows! Brynlee features a sweetheart neckline. removable long sleeves with snap buttons to secure on. padded cups. a sleek bar strap. lace up ties at the lower back. and a mermaid silhouette accented with a high side slit. Complete look with rhinestone heels and an anklet. Fit & Features Sweetheart neckline. padded cups Removable long sleeves Bar strap. lace up back High side slit Mermaid Lined crepe fabric Form hugging fit. moderate stretch. runs true to size