Sequin Mermaid Prom Dress: PromGirl Exclusive 250066Fitted and glamorous, this sequin lace mermaid prom dress is a luxurious look for formal events. Sold exclusively at PromGirl, this backless long prom dress features gorgeously intricate sequined lace from the sweetheart neckline down to the hips. From there, feminine ruffled chiffon tiers cascade down to the floor. Thin straps that lace across the open back into an adjustable tie for a customizable fit in this ruffled prom dress. A side slit makes it