Sheath party dresses are our favorite, and here's why. A deep plunging neck looks very boss-lady-like with long sleeves, but makes the whole dress sparkly. Bam, and you look like a daring and breathtaking wonder woman! The soft fabric is skin tight yet airy, so you can dance and twirl all night long on your highest heels. Full length and an open back with a V-shaped cut is just the perfect mix for you to rock and shine all night long.