Free sample with every order Helpful for post-surgery knee conditions, minor knee strains, arthritic knee problems, weak and overstressed knees. It is also suitable for the elderly, people who had undergone surgery, people who do sports, people looking for protection and people who sit and stand for long hours. The Ebene Bio-Ray technology is a far-infrared radiation (FIR) formed by natural mineral elements and trace mineral elements. FIR emitting materials help slow muscle fatigue and relieve pain. Ebene Bio-Ray helps heat energy penetrate up to 3-4cm below the skin. The product also contains Tourmaline which enhances FIR effects. Bio-Ray with Tourmaline provides more effective pain relief & promotes faster recovery from injuries. 1 x Ebene Bio-Ray Knee Guard with Tourmaline 1 pair