Siena Maxi DressSiena Maxi Dress Long Sleeve, Square Neck, Pleated Silhouette The Siena Maxi Dress is a refined maxi dress crafted in a smooth polyester and spandex blend with a soft hand feel and subtle stretch. Designed in a rich neutral brown tone, this brown maxi dress features a square neckline, long sleeves, and an elegant pleated skirt that falls to an ankle length finish. Structured with an empire waistline and a slim fit through the bodice, this long sleeve