I'm a very scepticle person but a respected work mate recomended these. In the past I had crashed a motorbike and then been run over! I was constantly taking pain relief which worried me. My work mate said they can take upto 3 months to work so I wore it constantly and forgot about it. Looking back I did not realise my drug taking had reduced to zero over this period. Happy. Don't know if it work or do I just think it works and get the benifit anyway? I don't know or care as I am much better than I was before.....result! Saved a fortune in perscription costs.