... experience 5.SGS,CE Report Item NameTHB Vitality Negative ion Bracelet MaterialTitanium,germanium,negative ions, silicone,POM claspsizeSize: 7”-9” is ... oxygen demand, thus contributing to health.The role of negative ions Negative ions can not only contribute to the body synthesize and store ... the body's physiological activity, so it is called "air vitamin" that it is the same as food, vitamins, ...