MontBlanc Shoulder Bag. SKU: 131757. Size: 9.45in 4.53in 5.12in. Montblanc Extreme 3.0 Motif Leather Shoulder Bag. This bag is adorned with a distinctive Extreme 3.0 motif pattern, featuring a spacious main compartment, metal detailing, an interior zipped pocket, and a removable strap. Material: Cowhide Leather.