Power Balance Performance Wrist Band Made by athletes for athletes, the Power Balance Performance Wrist Band is a favorite among elite competitors, weekend warriors, and every day fitness enthusiasts. It contains a thin polyester film hologram which reacts differently for each person. The thin polyester film hologram is programmed through a proprietary process which is designed to mimic Eastern philosophies that have been around for hundreds of years. Give it a try and see what it does for you.