Product benefit:I have tried almost every product on the market to relieve my knee pain. While it didn't make my pain completely go away, it provided enough relief to allow me to cope with my daily life. I have to admit, I was a little skeptical at first, fearing that this might just be another product that touts benefits but fails to live up to them. But I want to say that JAMBOSUN Roll-on Gel is really effective and makes people feel comfortable. I'm very satisfied with this,If you are still suffering from pain, you can try JAMBOSUN ball.