1.Warmth and comfort: protect the cold with our self heating knee pads, which provide 360 degree protection and improved joint . Keep knees and legs warm in the cold and prevent stiffness or discomfort. Enjoy more mobility and winter comfort. 2.Invigorate your body: By using advanced technology, our self heating knee pads are designed to relax the calf muscles and reduce fatigue, resulting in improved blood circulation. Give your legs the necessary swing and stimulate muscle activity like never before. 3. material: the skin friendly and breathable material of our self heating knee pads ensures a great comfort experience. The highly elastic fabric ensures a stretchy fit, so you can easily wear it for longer periods of time. 4.Revolutionary technology: these self heating knee pads use your body movements to release energy, making your knees feel warm and relaxed. When in with human skin, the pads generate heat that helps to soothe muscles and joints and is the perfect solution for anyone who leads an active life.