It bags come and go, and this season, it's going to be Prada's turn to take over our Instagram feeds. Although it falls into the it-costs-more-than-my-rent category, the Cahier bag has been conquering the hearts of fashion girls left, right, and centre, and it's easy to see why. Thanks to its unusual, boxy shape, this creation looks just as good paired with flowy dresses as it does with jeans, and its velvet finish would be the perfect addition to anyone's Autumn/Winter wardrobe. Keep reading to see how you could style it, and decide for yourself if it's worth an investment.