a circular piece of rubber you buy and put around your wrist to make you feel better about yourself. Although the money can often end up in rather stange places like ebay seller accounts, Nike (if you're aware of racism) or who knows where (make poverty history as it wasn't designed to make money apparently).
They can help stop skin cancer as they stop UV rays reaching your skin
hey I got a Livestrong wristband to show cancer awareness! You don't have one...are you not aware of cancer?