• Relief of muscle and joint pain associated with tiredness, muscle tension, excessive effort, strains, and sprains. • Provides up to 16 hours of long-lasting relief: 8 hours of constant heat during use and 8 additional hours after removing the patch. • Thermal cells that relax muscles and increase blood flow acting directly on the point of pain. • Drug-free adhesive patches that leave no residue and are comfortable to use during daily activities. • They heat up on their own when in contact with air in approximately 30 minutes without the need for manual activation. • Ergonomic design ideal for the lower back and hip area that correctly fits the body's shape.