Our library is shifting away from the Dewey Decimal System, so I just don’t wear this anymore 🤷🏻‍♀️ This is in very good used condition, but the material is thin, which means it’s lightweight but also may rip easily if you carry your keys in your pocket. (I have another one of these with a different design and my keys tore small holes in the pockets.) I don’t think this one has any holes yet, but full disclosure in case I missed any.