These are the most amazimg piece of pain control I have ever purchased! I bought these off QVC about 9 years ago at FULL prices plus P+P on top. Since having them I have lent them to my Mum, Mum inlaw, Nephew and Husband. My Nephew came round to see me and complained about his swollen knee. I taped the magnets onto either side of his knee, made him a cuppa, we had a chat. By the time it was time to leave he'd forgot about his pain in his knee and found it very hard to believe. He said he would never have believed it if he hadn't experienced it himself. He too bought some off ebay the next week. He has since bought the in soles and knee support. He does weight lifting you see so these are his menders. You cannot be without them, use them anytime anyplace anywhere! Brilliant