Black Formal Dresses With Slit & Windsor Black Formal Dresses With Slit & Windsor Black Formal Dresses With Slit & Windsor Kayley Formal Metallic Slit Long Dress & Windsor. Special Occasion Chic and stunning, the Hailey crepe formal dress knows how to make an entrance at black tie weddings and parties. Crafted from a lightweight crepe fabric, this floor length gown is designed with a lace up back to turn heads, a flattering slim silhouette, and a high front slit that brings a sultry allure. Pair with a hair accessory and clutch. Fit & Features Lightweight crepe fabric, stretchy knit lining Scoop neckline, padded bra cups Adjustable spaghetti straps Lace up back, lower zipper and hook eye closure High front slit Slim silhouette, floor length hem Runs true to size