I was skeptical of these patches and then when I was waiting 3 weeks to get it, I was double skeptical! However, when they arrived, I was ready to give them a try. I put them on and INSTANTLY I could feel the fumes of the herbs going into my knees! I couldn't believe it! It felt wonderful and I wore them to bed. I did not hurt all night and when I took the patches off, my knees didn't hurt all day! Amazing! You need to give these a try, I m serious.