The Reformation Percy Linen Midi Dress combines effortless sophistication with everyday wearability, featuring a classic silhouette that's perfect for any occasion. The Reformation Percy Linen Midi Dress combines effortless sophistication with everyday wearability, featuring a classic silhouette that's perfect for any occasion. 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.