This elegant and simple cuff is made of brass and is adjustable. It is in the nature of brass to tarnish over time. While it can be restored, you are encouraged to embrace the evolving finish of the metal. If you prefer, you can use Bon Ami Cleaning Powder, or a polishing cloth to restore the original finish of your item. To avoid dramatic oxidation, remove your jewelry before showering, swimming, or using sprays of any kind.