I purchased this several years ago at a famous department store in Tokyo. I've used it a few times, but it's in relatively good condition. It connects with magnets, so you can use it as a long or short necklace. It can also be used as a bracelet. I think you can use it in various situations. Some of the decoration on the connecting part is missing, but I don't think it's very noticeable. Please be aware of this. The material is unknown.