I bought "POWER BALANCE" a few days ago. "POWER BALANCE" is a wristband that has efficacy of balance. If you put on this wristband you could keep a good balance when you stand on one leg and so on. But I don't feel that efficacy yet. This wristband is popular between talents. For example Keisuke Honda who is a soccer player in the Japanese team for world cup, Jin Akanishi who is a talent of Johnny's office. It was maked by silicon. I can put on it with a light heart. I like to put on wristband because I feel stability when I put on wristband.