After purchase, I realized it had a mesh window on the side, which was a problem for me. Therefore, I am selling it unused for 10,500 yen, deducting 18,500 yen from the purchase price of 29,000 yen. The bag itself weighs 1.7kg and can be used as a backpack. Even with the wheeled section attached, which has a handle, it's still lightweight at 4.6kg. The wheels are large, making it easy to maneuver, and the item is functionally sound. Please refer to the attached images for the dimensions (size).