Because the casters can be removed, it's effective for saving space when storing in a car trunk, etc. Also, I thought it would be convenient to use because of its structure that combines the best features of soft and hard cases, so I bought it new. However, I made a mistake with the size, so I'm putting it up for sale. The construction of each part is solid, and it seems to be easy to use. Although the box and bag have been opened, it's only been checked and is unused. The following description is reprinted from the sales site. The size is M. External dimensions: Approximately 64 * 44 * 29.5cm Internal dimensions: Approximately 58 * 43 * 28.5cm Capacity: Approximately 71L Weight: Approximately 3.65kg Accommodation目安: 3-5 nights [Expansion function] There is a zipper on the side of the suitcase, and you can increase the capacity as needed. When you open the zipper, the inside of the suitcase expands, and you can store additional luggage. [Combination of hard and soft types] The corners of the suitcase are made of sturdy hard material, which protects the internal structure. The other parts are made of flexible material, allowing you to expand the storage space and easily take out your luggage. [Casters with excellent stability] High-quality casters with excellent quietness and durability rotate freely 360 degrees, and are stable when turning or traveling on rough roads. *The casters are not equipped with a stopper function. [Adjustable carry bar] It has a structure that combines sufficient strength and ease of use, and you can adjust the height of the carry bar in stages with a one-push button to suit your height and purpose. [Equipped with world standard TSA lock] It uses a world-standard dial-type TSA lock (certified by the Transportation Security Administration), which is essential for travel, and is convenient to open and close, and we recommend using it freely for business trips and overseas travel.