Natural plant ingredients: contains a variety of natural herbs, made from Chinese herbal plant extracts, hypoallergenic, non-addictive and has no side effects. Continuously heated patches help relax stiff, aching muscles and joints. 12 hours of long-lasting relief: 12 hours of long-lasting relief that provides continuous warmth and comfort, whether on the back, shoulders, neck or legs, it can promote blood circulation and relieve pain and provides 8 hours of warmth and comfort. Flexible insert, great fit: Our has 10 sheets. Measures 7cm x 10cm and can be cut to any size you want. With skin-friendly adhesive, it fits your body well and is suitable for workers, the elderly, athletes, housewives, etc. Durable and fast: it can penetrate deep into the injured area and relieve various pain in a short time. It targets discomfort and pain in muscles, back, knees, joints, shoulders, strains and sprains, neck etc. Easy to use: made of flexible fabric, easy to install and remove. Simply peel off the release paper of the plaster, apply it to the painful area and gently massage it for 1-3 minutes. You can cut it to the desired size, peel off the protective film and apply the heat patch to the affected area.