What are the necklaces all the baseball players are wearing and where do you buy them?

They are called Tornado Necklaces. The necklaces are made up of Germanium, Titanium and Anions that is infused into the material of the necklace. It is said from the company that makes the necklaces that this energy is then released into the body to help enhance athletic performance and reduce fatigue. They sell for $19.99.