A flexible orthosis to prevent contractures and pressure ulcers. Made in injection molded HDPE plastic and lined with breathable Vel-Foam material for optimal skin comfort. The orthosis is well padded to prevent the appearance of pressure sores. It is easily applied with the help of two Velcro straps. At the back there is one anti-rotation bar that can be folded out to prevent rotation. About two orthoses are used, these can be interconnected using these. The sole of the orthosis is only to be able to walk shorter distances in the room. The sole can be removed.