The product is likely a collection of costumes and designs inspired by the opera "Der Rosenkavalier" by Roller Strauss, curated by the renowned designer Karl Lagerfeld. This portfolio would showcase the unique and artistic costumes created for the classical, opera, and ballet genre, making it a valuable and sought-after item for music memorabilia collectors. The inclusion of renowned designers and iconic operas in the collection would likely make it a visually captivating and historically significant piece for any music enthusiast or collector. The portfolio is in new condition, sealed in plastic.