This item is for those who have completed the entire 110km Shin-etsu Trail (Mt. Madarao - Mt. Naeba). You can purchase this item after applying for a certificate of completion of the entire Shin-etsu Trail from the official Shinetsu Trail website (https://www.s-trail.net/english/certificate/). This is an original patch to praise your completion of the Shin-Etsu Trail. Since it is an iron-on type, it can be easily attached to your backpack, shirt, or other clothing. Diameter: 7cm Weight: 3g