folded back for fastening as is well recognized the velcro and related material comprise a series of j shaped hooks that engage loops and hold a desired attained position or tautness the respective straps and their coacting and co engaging d ring means together with their tabs plastic and metallic braces or hinges enable complete encirclement of the leg of the wearer at either the thigh or the calf and have the advantages delineated hereinafter the primary improvement of one aspect of this invention is the use of the flexible inelastic straps that are fully adjustable and are adapted to fit any size leg with the attaching at the anterior and posterior with their respective sets of d ring means for affixing the straps above and below the hinge means in combination with the plurality of pads disposed interiorly of and connected with the straps and the pairs of braces so as to control subluxation rotation and distal migration of the tibia the pads 33 as well as the condyle pads 39 41 are preferably formed of a resilient material an excellent material has been found to be ensolite which forms a superior foam pad as is recognized ensolite has a density in pounds per cubic foot pcf in the range of 3 5 to 8 5 of course other forms of resilient material such as foam rubber and the like could be employed if desired the hinge means 17 includes a single cam slot operator a first member having a slot simulating the path of traversal in flexure of the wearer 39 s knee and at least one second member having a cam means engaging the slot so as to traverse the.