This is the first knee sleeve I have used that works, my knees have consistently hurts for years, when I put these on , my first thought was, wow, comfortable! I soon realized my knee pain was gone as well. I decided to put them to the test and went to the skate park. I have to say after an hour and a half , I was surprised that my 43 year old abused knees are feeling not only fine but great. Unbelievable, they are pretty much magic , still a bit of pain at full bend but at least 80 percent improvement, I skate hard, I’m 210lbs and my knees have not forgiven me, but these knee sleeves are amazing. I have tried others that look like these but the don’t do anything at all except itch . Old bones knee sleeves are the real deal, I don’t know how but they absolutely work!