The M4s OA osteoarthritis knee brace utilizes medi’s unique and strong “s” style frame in the time proven four point configuration and incorporates medi’s patented varus/valgus loading mechanism to provide effective treatment for moderate and more significant symptoms of uni-compartmental osteoarthritis. The unique flex-bar system allows the strut opposing the loading mechanism to flex providing effective pain relief and reduce point-loading pressure and enhance patient comfort. The advantages of the flex-bar, loading mechanism and ability to align the brace to the individual patient combine with the soft-grip padding system and numbered straps to provide exceptional patient satisfaction and high compliance. This is the shorter version of our best selling OA brace. the length of this brace is 13.75".