The berry jewelry of Kuusade are handmade from polymer clay. Polymer clay is very durable, PVC based modeling material that is great with withstanding time and wear.

The metal parts on these earrings are 304 Surgical steel. Surgical steel is very suitable for almost all ears, as it is well tolerated by those with sensitive skin. Surgical steel contains nickel, but it is bound to the metal so that it does not dissolve in the body and cause a reaction or hypersensitivity, and is thus a material approved by TUKES, the Finnishs safety and Chemicals agency.