The Reformation Sadie Knit Top is a versatile wardrobe essential that combines a chic, minimalist design that effortlessly transitions from casual daywear to a stylish evening look. The Reformation Sadie Knit Top is a versatile wardrobe essential that combines a chic, minimalist design that effortlessly transitions from casual daywear to a stylish evening 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.