This is a supporter purchased from an orthopedic clinic for tennis elbow. It applies pressure to the cushion material inside the muscle to provide support and stabilization. I threw away the instructions, but you can find how to use it by searching online. I haven't used it constantly, only when my symptoms were severe, so it's in good condition. Wrapping it provides pain relief and makes it easier. I stored it in my medicine box after my symptoms disappeared. If you're suffering from tennis elbow pain, how about this? #TennisElbowSupporter #ArmSupporter #MuscleSupporter #MedicalSupporter