Montblanc Pouch. SKU: 130314. Color: Black. Size: 290 Ã 30 Ã 210 mm. Montblanc Sartorial Envelope Leather Pouch. Featuring a classic envelope design, this pouch is perfect for storing various business essentials. The band on the back allows it to be attached to larger bags in the collection, while two dedicated pen pockets securely hold writing instruments. Material: Calf-skin leather, Lining: Coated canvas.