Can I wear my bracelet in the shower?
If the bracelet is made of Titanium or Stainless Steel, you can keep it on while in the bath, shower, pool in the sea.
(Our magnetic bracelets made of the above metals will state that in the title)
Those are noble metals, and will not rust.
If you are having a pure copper bracelet or bangle, you can also have it in the shower. While copper will rust, that is usually will not be a problem for most buyer, who usually purchase those products just because they do want to transfer some of the copper to their skin, which happens when the item is getting rusted.