Sexy cocktail dress from Express. Black with white piping. Size 4. Never worn

Express sexy little black dress w/ white piping to accentuate curves or to make them! Fully lined. Fully exposed gold back zipper from neckline to hem. Figure flattering. Bodycon style dress. Size 4. Never worn but tag removed. Tag on inside says material is 65%rayon, 30%nylon and 5% spandex.