Longchamp Le Pliage Expandable Travel Bag is a water-resistant nylon-and-leather weekender bag that is expandable with a zip insert. It is the size of a typical tote bag and is made with lightweight polyamide canvas. It features a discrete expandable zipper that adds an extra 20 liters of space, meaning the bag can be a whopping 70 liters if desired. It is also foldable and can be easily stored or packed flat.