A beautiful classic, this strappy-back long lace prom dress is sold exclusively at PromGirl. This fully-lined floor-length long formal dress has a sheer lace overlay from the curved neckline to the hem. Thin shoulder straps lace up over the open back of this long lace special-occasion dress, while the long skirt honors the curves before ending at the floor in a small train. Polished posh for prom, galas, and other formal events, this strappy open-back long lace prom dress radiates sophistication and charm.