Elegant black long mermaid prom dress features off-shoulder sweetheart neck, short cap sleeves, high thigh front slit and luxe soft velvet fabric for formal prom & black-tie evening events. Accessories not included. Off-Shoulder Sweetheart Neck：Short folded off-shoulder cap sleeves frame a subtle sweetheart bustline. High Front Thigh Slit：Bold vertical high slit on the mermaid skirt to show leg line, fitted through hips and flared at hem. Premium Soft Velvet：Thick matte velvet fabric with gentle stretch, smooth plush texture for a luxurious matte finish. Hidden Back Zipper：Concealed vertical center back zipper for easy on and off, simple plain back design. Perfect for high school prom, gala dinners and formal black-tie banquets, classic velvet fabric delivers timeless sophisticated charm.