All metal parts of the Moonbeam wristband and the main parts of the Equator wristband are made of surgical-grade stainless steel (316 stainless steel). Please note, all stainless steel contains nickel and may cause an allergic reactions in someone with a nickel sensitivity. The amount of nickel in all our products meet the European Union’s Nickel Directive for jewelry (EN1811 2011).
However, we do have other wristbands available for purchase, which do not contain nickel, and those are the Amazfit Rainbow Wristband (aluminum parts http://amzn.to/2bwIAIj) and the Amazfit Sport Wristband (ceramic part http://amzn.to/2c5AJjJ). The ceramic tracker itself in combination with one of the other bands certainly contain no nickel.