Power Balance Pro Ion Silicone Wristbands The Stylish Way to Enhance Your Sporty Look! Sleek, stylish bands are crafted from 100% surgical grade silicone. Durable and made to last, the wristbands come complete with two Power Balance holograms in various colors. Power Balance Pro Ion Silicone Wristbands features: Made with comfortable, durable 100% surgical grade silicone Wristband is completely waterproof Two holograms have cutting-edge, three-dimensional imaging Hologram design is based on Eastern philosophies related to energy Stretch fit extends easily over your hand Small (6.3") a Medium (7.5") a Large (8.1") Power Balance...Prepare. Perform.