Butterfly-Print Strapless Mermaid Prom Dress CB099A beautiful butterfly print makes this long mermaid prom dress stand out at any formal event. Add to that a bustier style corset bodice and a hip hugging long mermaid skirt, and this strapless evening gown is simply jaw dropping for prom, galas, and other black tie events. The long formal dress features a sheer waist that wraps around to the back and a fully lined long mermaid skirt with a butterfly print sheer tulle overlay that smooths over the hips