Lovely in lace, this long formal lace dress, under $100, is ideal for prom, winter formals, and more. In a visually-slimming princess cut, the spandex-lace evening dress fits the form from the v-neckline through the hips before draping to a relaxed mermaid-style floor-length skirt. The lace bodice has unlined cap sleeves and a scallop-trimmed v-neckline that plunges almost to the waist. With a slight spin, the sexy evening dress reveals an eye-catching open back that secures at the top with a button and loop closure. This form-fitting long lace formal dress sets a sultry tone for black-tie galas, holiday celebrations, and other special occasions.