The Reformation Defina Knit Mini Dress features a fitted bodice with an elegant drop waist, full skirt, and boat neckline. The Reformation Defina Knit Mini Dress features a fitted bodice with an elegant drop waist, full skirt, and boat neckline. 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.