This 15cm sports bracelet contains two types of titanium. Titanium micro-beads and carbonized titanium. This bracelet is made of a silicone elastomer. The Sports Armband is used for reducing tension in the wrists and arms. The Sports bracelet is perfect to wear during sports activities, as well as in everyday life while working on the computer. The sports bracelet can also be worn while swimming too. The sports bracelet can be cleaned under running water.