The anodized aluminum that I work with is free of lead and nickel, and therefore hypoallergenic. It does not react to perfume, water or sea water, it won't tarnish or rust, or discolor your skin. The aluminum is lightweight, making it comfortable to wear daily. I call it the "FOREVER JEWELRY!"
Disclaimer: If you are allergic to metals and not sure of the affects of aluminum to you, please consult your physician.