Tailored by three-dimension of knee and adjustable tension by yourself to add pressure effects of the outer edge of the patella and open front of the EVA hollow circular gasket designed to strengthen the patella is more stable. Opening relieves pressure on patella and avoids inappropriate knee discomfort before the force caused by the phenomenon of right knee injury or chronic joint discomfort is to help share the excessive force and reduce the possibility of re-injury! Contour design for custom fit. In addition, the design of two springs on both sides of the knee which can be easy to put the knee on the right position. The patent of environmental material of Inno-TexR which is fully breathable, quickly rule out the heat and moisture during exercise and keep dry and comfortable protection.