An elegant take on the classic slip dress, the Reformation Tiffie Dress features a v neckline, lace trim at the cap sleeves and neck, and a tie at the center front. An elegant take on the classic slip dress, the Reformation Tiffie Dress features a v neckline, lace trim at the cap sleeves and neck, and a tie at the center front. 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.