Colors: Black, White, Blue, Yellow, Red, Transparent Brand: Power Balance Condition: New Size: S(17.5cm),M(19cm),L( ... Worn by many pro athletes Increased Core Strength Product Description: POWER BALANCE bracelets contain two Mylar Hologram's which are embedded ... with your body's electro-magnetics field. When the static POWER BALANCE Hologram comes in contact with your body's energy ...