Applicable People: Knee patches suitable for seniors, athletes, office professionals, sports enthusiasts, manual laborers, bodybuilders, long-distance drivers and individuals seeking the benefits of hot and cold therapy. Suitable for Whole Body:Body relief patches are suitable for neck, shoulders, knees, ankles and other uncomfortable areas except knees. Easy to Use:Before use, clean the skin with warm water and keep it dry, remove the protective film, and apply the patch to the painful area. Gentle and effective relief for muscle and joint discomfort. Designed to Fit the Knee Joint:With rounded corners and flexible fabric, it's easy to adhesive and the patch flexes with your movements. Shaped specifically for body parts for a better fit and better function. Long-lasting and Effective:Naturally heated patches can penetrate deep into the injured area of ??the muscle to provide up to 12 hours of relief for joint and muscle discomfort. Safe and without side effects.