Balenciaga New Product Release: Balenciaga Bag Charm Keychain. Balenciaga Keychain, the latest style bag charm with a higher level of sophistication, featuring a design concept inspired by classic collaborations, part of the keychain series.Details include a vintage finish, not the glossy version available on the market. This item has been consistently popular and is a best-seller within Balenciaga, making it a perfect match for trendy backpacks.