Black Ruched Long Sleeve Backless Bodycon DressLulus Exclusive! Dance, mingle, and dazzle in the Lulus Sweet Thing Black Ruched Long Sleeve Backless Bodycon Dress! This little number is the perfect stretchy night-out bodycon dress with its super sexy low-cut back, high neckline, long fitted sleeves, and a figure-skimming midi silhouette. Ruching at sides and back add the final sultry touches. Darted bodice.