Elegant Mermaid Sweetheart Neckline Strapless Back Zip Floor-Length Black White Two-Tone Prom Dresses with Bow DetailStep into elegance with LuodiLan's mermaid style prom dress. It features a strapless deep V neckline, bold black and white two tone design (velvet black + satin white), a dramatic back bow, and a sweeping traincrafted from luxe mixed fabrics (soft velvet + smooth satin, with a curve hugging silhouette). The design blends classic contrast (black & white) with glamorous detail (bow + train), making it ideal for formal events, galas, and special