Stainless steel.

98% of people will not experience allergies when wearing it. Although allergic reactions in a very small number of people cannot be ruled out, simply stop wearing the jewelry if an allergic reaction occurs.

First, use a strip of paper to measure the suitable size, then use a measuring tool to compare with the corresponding size chart before purchasing.

First,natural oxidation: When exposed to the air for a long time, a thin oxide layer forms on the surface, causing the luster to fade. Second,contact with chemicals: Substances like cosmetics, perfume, and body wash contain chemicals that can corrode the surface, leading to peeling of gold/silver platings, and causing the jewelry to turn black or yellow. Third,uncleaned sweat residue: Failure to clean sweat off the jewelry in time also accelerates the decline of its luster.

Most people believe that stainless steel "never rusts", but in fact, its rust resistance relies on a thin chromium oxide passivation film on the surface. If this film is damaged (e.g., exposure to seawater, chloride ions in sweat, or long-term friction and scratches), or if the jewelry is made oflow-grade stainless steel(with insufficient nickel/chromium content), rust spots may appear. This is especially likely to occur in humid environments with high salt levels.