The Lottie Vest from Reformation is a sleeveless style featuring a mock neckline, button front, and a split hem for a modern, tailored look. The Lottie Vest from Reformation is a sleeveless style featuring a mock neckline, button front, and a split hem for a modern, tailored look. 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.