Nickel-free earring findings allow most people with metal allergies or sensitive skin to still wear earrings. Chose from titanium, niobium, aluminum, nylon, and rubber earring parts including hooks, posts, and backs. An allergic reaction to nickel is one of the most common metal allergies. The earring findings below are 100% naturally nickel free because they're made from materials that never contain nickel! This is not the case with many hypoallergenic earring findings on the market. The term hypoallergenic has no legal or medical definition for use in jewelry. That's why, when you're looking for hypoallergenic jewelry supplies, your best bet is to look for parts specifically made of nickel-free materials - like the earring parts below.