NIUNIU Tourmaline Self Heating Knee Pads Warm for Arthritis Joint Pain Reliefs Knee Protection ToolsMade of high quality material,durable.Soft,breathable and comfortable to wear.High elasticity design,be Comfortable and free of movement.Functions: protect the knee, prevent arthritis and relieve joint painOne-piece molding, more fit to the human body, not easy to slide, the inner high-quality cotton absorbs sweat and wicks moisture, and protects the knees.Add velvet inside, meticulously stitched, thicken to keep warm, lock temperature and anti-freezes, it will be warm as soon as you wear it.Notice:Actual color may be slightly different from the image due to different monitor and light effectPlease allow 1-3cm deviation due to manual measurementMain material: Spandex, polyester, latexApplicable people: generalsizeRecommended weight 52.5kg-62.5kgHeating time: 16 hours and abovePackage Includes:1 pair x Knee Pads