Men's Blue and Khaki Double Genuine Leather Messenger Bag 13 Inch Crossbody Shoulder Bags Material is cowhide genuine leather,inside is special nylon. Size approximately 13.8"L x11.4"D x 3.5"H inches One side is the structure of the large main compartment, the interlayer position, cigarettes, cell phone pouch, two pen, On the other side is one main compartment, two zipper interlyer position A adjustable shoulder strap