Field Champ Necklace, Titanium Camo Licensed Vista Camo Woven Titanium Sports Necklace for Men and Women with Negative Ions to promote balance, calmness and alterness Size: Large - 20cm Common among professional baseball pitchers whereas calmness, alertness and balance are critical Now you can enjoy the same benefits enjoyed by professional athletes whether you are in the field, at the gym, on the streets or anywhere else