Here's a long a-line prom dress with a sheer lace corset that is both feminine and eye catching. The gorgeous long formal dress features a sheer corset-style bodice with floral lace in all the right places for a flirty look at prom, galas, and other black-tie events. Thin shoulder straps lead to the trendy corset detail that laces up over the open back of this fabulous long a-line evening gown. The long teen dress has a fully-lined long skirt with a lace-embellished sheer overlay that opens in a side slit before ending at the floor in an a-line shape. In misses and extended sizes, this long a-line prom dress is a rich design that combines traditional style with contemporary details.