Donna Mizani Nia Dress in Black. - size XS (also in ) Donna Mizani Nia Dress in Black. - size XS (also in ) 90% nylon 10% spandex. Dry clean only. Unlined. Hidden back zipper closure. Feather trim. Stretch fit. Neckline to hem measures approx 29.5 in length. DONN-WD301. D1463 F99. Designer Donna Mizani launched her eponymous line in 2008 with a collection of soft knit silk pieces. Known for her ability to spot trends, Mizani's collection embodies a style for the fashion-forward. Classic dresses and separates feature modern twists and current details, all rendered in a cool, seasonal palette.