I received this product as a sample and was skeptical about how hot it would get and how it would stay in place. All I can say is how did I live without them!! I used this when I had injured my back from a workout gone wrong. It soothed my muscles and made me feel very calm and at ease. It felt a bit strange at first but after a while all I felt was nice and warm. The heat also stayed active for a surprisingly long time and wasn't too hot that I couldn't stand it on my skin. Since trying the sample I have purchased this product and will continue to do so!
I don't rate this as I have had a bad reaction to one of these causing me to need hospital treatment because it actually burnt my skin but to be honest I no a few people who have been OK with them I could of just had one from a bad batch doesnt mean all of them out there could do what I had happen to me so I think I couldn't recommend because of my last experience but I had used these prior to my bad experience and they was great I was just put of due to my last experience with them
These work very well for back strain , in my case anyway , i work out alot and often suffer from lower back pain , these do help .. they aren't a miracle cure but definitely relieve some pain ... would buy again