One-Sleeve Long Prom Dress with Train: Atria 6716HMake a fashion statement in this one sleeve long prom dress 6716H from Atria Couture. With an asymmetrical neckline, this long formal dress features one long sleeve for a sophisticated look whether you are attending prom, a fancy gala, or another black tie event. In misses and some plus sizes, this elegant evening gown has a hip hugging long skirt with a side slit and a small train that completes the look. The epitome of contemporary elegance, this