The Reformation Stasia Dress is a fitted slip-like silhouette with a V-neckline and lace details. The Reformation Stasia Dress is a fitted slip-like silhouette with a V-neckline and lace details. Founded in 2009, Reformation is a revolutionary lifestyle brand combining stylish, vintage-inspired designs with sustainable practices. With each limited-edition collection, the LA-based brand empowers individuals who want to look beautiful and live sustainably.