Morgana Lace Up Ruched Mermaid Dress Ruched Maxi Dresses & Windsor. Special Occasion The long formal dress features a sleeveless sweetheart neckline with floral lace trim, lace flutter shoulder straps, a lace up back design, ruching throughout to enhance curves, and a mermaid silhouette that flares at the hem. Fit & Features Lined smooth knit fabrication Sleeveless sweetheart neckline with lace trim, padded bra cups Lace flutter shoulder straps Lace up back design Ruching Mermaid silhouette Long length hem Runs true to size