Product Description Wraps snugly around the affected area, providing targeted pain relief that penetrates deeply, warming the muscle right where it hurts When worn for 8 hours, can deliver up to 16 hours of soothing back pain relief Applied directly to the skin, allowing you to stay on the move. Features & Benefits Heat therapy has been used for generations as a soothing method of relief from pain - and it's been proven to be very effective. ThermaCare HeatWraps are made of soft layers of comfortable material that contain patented heat cell technology, using the heat generating ingredients of iron, charcoal, salt and water that react on contact with oxygen to produce heat. Once warm, ThermaCare stays warm for up to 8 hours, penetrating deep to relax tight muscles to help circulation flow in and pain flow out. ThermaCare's 8 hours of continuous, low-level heat directly to the site of pain go on to provide up to 16 hours of powerful pain relief and deep muscle relaxation - so you feel better, all day long. ThermaCare is a great portable pain relief - the HeatWraps can be worn discreetly under your clothing at home, work or during other everyday activities. If you're not keen on taking pills for your back pain, ThermaCare is as effective as taking 6 painkillers throughout the day. *based on taking 2x200mg ibuprofen three times a day How to Use Tear open the pouch when ready to use. It may take up to 30 minutes for ThermaCare to reach its therapeutic temperature. Place over pain area with darker discs toward skin and fasten the belt. For maximum effectiveness, we recommend you use ThermaCare HeatWraps for Back Pain for up to 8 hours. Dispose of used wrap, whether warm or cold, in regular household waste. If you are 55 or over, please wear ThermaCare over a layer of clothing, and do not wear whilst sleeping.