My wife purchased a Sabona copper bracelet for me, to reduce hip pains that prevented my getting a decent nights sleep. I thought the idea ridiculous, but decided that if it didnt help then at least it shoud not cause any harm.I wore it and forgot about it,until about two weeks later I realised that I was sleeping better and the pains had gone. I dont know how the bracelet works ie by proven scientific facts and plausible mechanisms etc but I do know, that for me it works.