Reformation's Idelle Dress features a sleek A-line silhouette with mini eyelet details along the skirt. Reformation's Idelle Dress features a sleek A-line silhouette with mini eyelet details along the skirt. 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.