The Reformation Pippa Denim Midi Dress is a figure-flattering design with a fitted bodice, high neckline, back keyhole cutout, and a full A-line skirt. The Reformation Pippa Denim Midi Dress is a figure-flattering design with a fitted bodice, high neckline, back keyhole cutout, and a full A-line skirt. 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.