Perfect for sun-soaked days, the Reformation Sebastien Denim Dress offers a flattering fit and effortless style that seamlessly blends comfort with elegance. Perfect for sun-soaked days, the Reformation Sebastien Denim Dress offers a flattering fit and effortless style that seamlessly blends comfort with elegance. 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.