This item was used by my son for about 3 years, from elementary to middle school (twice a week). It does not convert into a backpack. I am selling it because it is no longer needed. It has been stored cleanly with a desiccant, so there is no particular odor. There is a small white stain on the left side, though it's not very noticeable. Also, there are some areas where the netting on the upper part of both sides is slightly peeling; please check the photos. For those who can use it. It will be folded for packaging and shipping. There are also kote (forearm protectors) like those in the photo. These were used in the upper grades of elementary school (small size). If anyone wants to repair and use them, I will include them for free.