Original Backnobber Size:Red RB3905R Featuring detachable straps for proximal Featuring detachable straps for proximal and distal adjustments with a side pull strap to apply pressure and aid in controlling unwanted movement of the patella Low profile rocker sole enables a normal walking gait with less forefoot angulations' and reduces hyperextension of the knee enhances mobility and mid stance is designed to minimize hip differential Made from a steel rod bent in the shape of an "S" with natural wooden knobs permanently affixed to each end Natural shape allows the user to apply as much pain releasing pressure for as long as required to achieve its remarkable effects