Montblanc Business Bag Montblanc Sartorial Ultra Slim Document Case 118689. The Montblanc Sartorial Collection speaks the language of modern elegance. With its iconic Saffiano leather print the brand new Ultra Slim Document Case measures only 4 cm wide. It can be used as a laptop case, with the advantage of handles and a shoulder strap for easy carrying. The additional open pocket on the front is highly practical for tickets and small items requiring quick access.