These minimalist rings are made of titanium steel and 18k gold filled. Titanium steel can hold up well to regular wear without deteriorating. 18k gold-filled finish means a much thicker coating of gold than normal jewelry. Please note these rings are water-resistant. It won't turn your skin green. To keep the color lasting longer, I would avoid wearing it to shower or swimming.

Materials: 18k gold filled; titanium steel

Features: water-resistant; hypoallergenic 

❤Hypoallergenic Metals for Sensitive Skin❤

If you have sensitive skin, you should look for materials that are copper-free and nickel-free.