Black tie sits comfortably at the peak of formality without being too over the top. It's that sweet spot between cocktail attire and the ultra fancy white tie. Think of it as the perfect balance Berylove Women Black Formal Dress with Slit Mermaid Halter Neck with Hook Satin Formal Wear Dress, Black US22W Satin Halter Neck Back Tie Dress in Black Zapaka Women Plum Formal Dress with Slit Halter Cut Out Mermaid Satin Long Black Tie Dress, Dark Green AU6