Soft upper and lower suspension sleeves and popliteal interface combine with adjustable straps to hold the frame in position as the straps are adjusted to provide a “stop” to control the ability of the knee to hyperextend. Longer uprights (when compared to the Swedish Knee Cage) reduce the amount of pressure required on the femur and tibia to control hyperextension, making the orthosis better tolerated by the patient. Dual axis joints allow for full knee flexion and allow each of the four uprights to move independently over each other, from extension to flexion, enabling the orthosis to follow the natural movement of the leg and prevent downward migration. Low profile hinges with slim uprights that are easily shaped to ft the contours of the leg to create an orthosis that becomes virtually unnoticeable underclothing. Made of synthetic leather laminated with polyurethane foam and brushed polyester tricot. These unique pads provide a soft interface between soft tissue and the orthosis. D-loops are available for patients with limited use of their hands to make the application of the device easier. Straps are attached to the suspension sleeves, eliminating confusion of which strap goes where. After initial fitting, the wearer just closes or opens one side only of the front straps for simple application and removal.