[Material] High-density nylon twill, coated polyester, and grain-embossed cowhide leather. [Size & Weight] 40cm wide x 30cm high x 8cm deep (13cm when expanded). Weight: Approx. 800g (body), approx. 120g (shoulder strap). [Number of Pockets & PC Storage Capacity] Exterior: 4, Interior: 6, Pen Slots: 3. PC Storage Capacity: 16 inches (based on a 16-inch Mac Book Pro). [Shoulder Strap Length] Maximum: Approx. 130cm. [Product Description] The body is made of high-density nylon twill, and the accessories are made of coated polyester and grain-embossed cowhide leather for durability. The zipper on the gusset expands to increase storage capacity, and the interior also features a base plate that can accommodate the expanded gusset.