JointFlex FIT Therapy Far Infrared Patch for Lower Back, Supports Continuous Active Mobility, up to 5 Days/Patch, Synthetic, Water Resistant, Non-Heating, Drug-Free—3 Pack, 7.87"x 3.93"

They work if u have pain pretty much anywhere. Helps so much better than Salonpas. I found these after trying several other products. These work the best and stay on a few days. They take the edge off and give some relief. They helped in bad situations. I recommend.

The first one was great. I put on another one and had an adhesive reaction. If you are prome, avoid.

These are a life changer! Helps my back so much!!!

Does ok. Doesn’t fully ease my back pain. They do stick pretty good and lasts a couple of days

These are just regular patches, like pain patches. Only, they are much thinner, difficult to put on and keep on. There's no way they last five days. I made it to one and a half days. They do absolutely no good whatsoever, even if you believe with all you have. They are axlet down of epic proportions, which is one thing oeople in chronic pain don't need. There really is no smell.