Beyond BodiHeat is an easy-to-use, non-medicated, air-activated heat patch that delivers up to 12 hours of soothing pain relief for sore muscles and joints. Our exclusing formula works with your own circulation to spread the warmth further to ease your pain fast. It's patented Purge natural mineral powder works with other ingredients to relieve and minimize pain without medicates, odors, or messy ointments and creams. Over the clothing application keeps your skin clean, protected and perfectly warm as your muscles and joints heal. Avoid smelly creams, messy ointments, and other patches that leave a sticky residue on your skin. Beyond BodiHeat Heat Patches apply directly to any piece of clothing for immediate warmth and relief, leaving no residue or ordor.-Open the package and expose the pad to the air. No kneading or shaking is necessary. -Apply the pad to the desired location on your body, over top of your clothing. The pad will heat up within 20 minutes after opening. -Do not adhere the pad directly to the skin.