Thank you for viewing. This is a seat bag from DEGNER. Retail price: 17,930 yen Capacity can be adjusted in 3 stages. A full-face helmet can fit when at maximum capacity. Originally, it could be used as a backpack, but one of the strap attachment points is torn. Please see the manufacturer's website for details. Please refrain from purchasing if you are sensitive to used items, as this has been stored by a private individual. It has been used for about 3 years. There are some scratches and dirt. It will be sent in simple packaging. *It is a specification that the zipper for expanding the bag's capacity gets caught. This is because there are seams inside. You can use it without getting caught by consciously pulling the zipper towards you.