DonJoy Tru-Pull Lite Patella Tracking Knee Brace Medium Left by Donjoy. $119.99. Independent anchors at the thigh and calf prevent rotation of the brace. Bifurcated strap dynamically pulls the patella into proper alignment reducing pain associated with patellofemoral dysfunction.. Leaves skin cool and dry. The TRU-PULL LITE, ideally suited for adult patients with mild subluxation, mal-tracking, and patella arthritis.