A little flirt can't hurt. Featuring a sweetheart neckline and romantic puff sleeves, the Rebecca Dress is single and ready to be taken (by you, of course). A little flirt can't hurt. Featuring a sweetheart neckline and romantic puff sleeves, the Rebecca Dress is single and ready to be taken (by you, of course). 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.