Sheath Satin Strapless Long Prom Dress with Slit FannyWe Sheath Column Square Neckline Soft Satin Prom Dresses With Rhinestone Sheath Strapless Floor Length Design Satin Prom Dress with Split Front Sheath Column Silk like Satin Prom Dress Square Neckline Floor Length Sheath Column Square Neckline Sleeveless Sweep Train Silk like Satin. This sophisticated prom dress features crimson satin fabric: it has a square neckline (with sweetheart inner detail), sleeveless design, form fitting sheath silhouette, open back detail, and a sweeping floor length hem (with subtle back slit). The bold, elegant style is perfect for fall evening proms, formal galas, or timeless luxury events.