1. Air-activated 2. Self-adhesive back 3. Apply anywhere 4. Discreet, natural therapeutic heat 5.ISO approved INTRODUCTION:Warm, soothing relief for muscle and arthritis aches and painsAir-activated, self-adhesive backSafe,odorless,micro-thin,easy-to-use,environmentally safeAverage temperature is 52 °Cover 12 hours of natural therapeutic heatMAIN INGREDIENTS:Iron powder, Salt, Activated Carbon, ...