Stainless Steel is the most amazing material to create simple long lasting jewelry. These Oversized Petal Minimalist Earrings are Waterproof, Hypoallergenic. Lead Free Nickel Free. All Smooth and High shine Ep Coated against scratches. They move on the ear with an articulated Button. Butterfly back closure. Super Comfortable- Carving in the back for texture and to remove weight.