Knee pain Relief PatchFast Pain Relief Knee Pain Relief Patch has a unique formula, that quickly heats up and effective pain relief, suitable for knee pain, muscle aches, back pain, strain and sprains, etc. Natural Ingredients The pain relief patch is made of a variety of pure natural plant extracts and is made with a scientific self heating patch design to provide deep penetrating pain relief for muscle soreness and joint soreness. Knee Pain Relief Patches Easy to Use