I bought these over a year ago for my knees and they worked miracles! Then I wanted to order more and I ordered the back ones by mistake. They worked miracles, as well, but I am using them on my knees more. But I have been telling ALL my friends about them so I hope they start to buy them, as well. I teach line dancing which is a lot of knee movement so I hand out a patch if someone is hurting and they love them. Thank you so much!!!