- Thermal patch designed for pain relief in the lower back and hip area - Provides up to 8 hours of therapeutic heat and an additional 8 hours of relief after use - Relaxes muscles, improves circulation, and reduces muscle and joint discomfort - Automatic activation: just open and place over thin clothing on the affected area - Contains no medication, safe and leaves no adhesive residue - Recommended for athletes, people with physical jobs, or household tasks - Effective for fatigue, muscle tension, strains, sprains, and arthritis - Includes 2 units, practical and comfortable for daily use