Deep Heat Patch provides up to 8 hours of targeted pain relief for back pain, muscular aches, and joint stiffness. The odourless patch activates in 60 seconds, increasing blood flow and aiding healing. Ideal for discreet use under clothing. Odourless and drug-free Activates within 1 minute Heats up within 5 minutes Lasts up to 8 hours Provides targeted relief Suitable for muscular pain and stiffness Easy-to-apply adhesive patches Can be worn under clothing Active Heat Materials: Iron powder, Activated Carbon, Vermiculite, Potassium Chloride, Water. (Chemical reaction creates heat).Deep Heat is renowned for its effective heat therapy solutions, providing targeted pain relief for muscles and joints.Apply to clean, dry skin. Tear open packet, remove protective film, and apply adhesive side to skin. Single use only.Do Not Use On The Face, Broken Skin, Or While Asleep.