Strappy-back long prom dress 7089H by Atria. With a v-neck bodice with triangle-shaped keyhole cut out, this long formal dress gets a sexy vibe, while thin spaghetti straps criss cross the open back before lacing up for the best fit. Made in the USA, this gorgeous gown has a hip-hugging long skirt with booty-contouring ruching, a thigh-high side slit, and a dramatic sweep train