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 18,000 yen, deducting 11,000 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 wheels attached, which have a handle, it's still lightweight at 4.6kg. The large wheels make it easy to maneuver, and functionally, it's a good product. Please refer to the attached images for the dimensions (size).