The strongest model in terms of support strength to suppress forward and left/right shaking. The unique functional stays are designed to allow smooth bending and stretching while firmly restraining wobble to the left and right of the knee. Double X straps on the lower front and upper back of the knee effectively compresses the thigh and lower leg. The double X-straps on the lower front and upper back of the knee effectively compresses the thigh and lower leg, and the functional stays work together to prevent forward wobble and twisting of the lower leg. The patella pad conforms to the shape of the knee and provides extensive pressure around the patella to enhance stability.