New Without Tags The Sei Rib Knit Midi Dress Dark Blue Large The Sei provides direction to the of-the-moment tank dress for a calf-grazing fit in their body-hugging rib knit. Pull-over style. Wear to a wedding, cocktail hour, date night, out on the town, and more! Fabric: 53% viscose, 45% nylon, 2% spandex Dry clean Imported Approximate Measurements: (Laying flat, un-stretched) Length: 51" Waist: 10" Pit to Pit: 12"