Note: the package only include the pendant, the chain not include. Material: 100% 925 Sterling silver; Environmental: Lead Free ,Nickel Free , Allergy Free; About 925 sterling silver: 925 silver refers to a silver product containing about 92.5% of silver. The purity is about 92.5%, which is considered pure silver. Because too high purity silver is soft and easily oxidized. 925 silver adds 7.5% other metals to give it the desired hardness. 925 sterling silver is the international standard silver for silver jewelry in the world. Sterling silver maintenance: 1, Avoid contact with chemicals; 2, Avoid wear washing,swimming; 3, Avoid inpact scratches; 4, Avoid wear sporting; 5, Use a soft clothavoid, 6, Take off and store in a dry place when taking a bath and sleeping.