Power Balance. Performance Technology. Improved Balance. Greater Flexibility. Increased Core Strength. Condition is "New". Power Balance Perfomance Technology is a mylar hologram that is embedded with a range of frequencies found in nature that react positively with your body's energy field. It has been shown to improve balance, flexibility and strength as well as contributing to an overall sense of well being among its users. Stocks are limited.  Please send message to choose the color and size as follows: