ACEGENE bag for A4 size, with a detachable shoulder strap. * Compact, suitable for commuting by train. * Please see photo 2 for the thickness. * Normally, the dividers are connected on both sides with Velcro as shown in photo 3, but you can open it fully as shown in photo 4 by removing them. * Can be hooked onto the handle of a carry-on bag. * The leather parts, such as the handles, show signs of use, but the main fabric is high-quality and durable, which is what you'd expect from ACEGENE.