The Reformation Niamh Cap-Sleeve Open-Back Silk Maxi Dress exudes timeless glamour with its luxurious silk fabric, chic cap sleeves, and alluring open-back detail, making it the epitome of sophistication for any formal affair. The Reformation Niamh Cap-Sleeve Open-Back Silk Maxi Dress exudes timeless glamour with its luxurious silk fabric, chic cap sleeves, and alluring open-back detail, making it the epitome of sophistication for any formal affair. 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.