Natural ingredients: Knee pain plasters are made from Chinese herbal plant extracts, pure natural plant ingredients without side effects. Safe and without stimulation. Durable: Our heat patches have strong penetration power and targeted analgesic effect, which can last up to 12 hours for sore muscles, back pain, joint pain, shoulder pain, elbow pain and knee pain. ERGONOMIC DESIGN: Ultra-thin, comfortable, ergonomic design ensures a snug fit; medical grade adhesive is softer on the skin. Knee plaster is convenient to use, easy to use and carry. Multi-purpose: Our pain patch can relieve various pains such as knee pain, joint pain, back pain, strains, sprains, shoulder pain and neck pain. It can penetrate deep into the area where the muscle is injured. Suitable for drivers, office workers, athletes, the elderly. Comfortable to wear: you can cut the plaster into any size that fits the painful area.