Montblanc Pen Pouch Sartorial 1 Pen Foldable 116331. The Montblanc Sartorial Collection speaks the language of modern elegance. With its iconic Saffiano leather, this slim pen pouch can fit one writing instrument the size of Meisterstuck Classique or LeGrand. Thanks to its foldable construction it is very practical: when it contains a writing instruments it has a nice triangular shape, when it is empty the sides can be folded and it becomes flat, taking up minimum space.