With an aluminium umbrella you are on the safe side!
When manufacturing umbrellas different materials are used. We decided to provide only aluminium umbrellas.
Aluminium is a lightweight material, but as well robust and stainless. This way your umbrella is handy and will last for a long time. Sometimes a special kind of rust can be seen on older umbrellas as the powder coating has been partially damaged because of friction, but this rust can be removed easily by using a regular cloth.