Coopercare Lastrap for the knee is both a shock absorber and a muscle warmer. It is scientifically designed to relieve pain and soreness from patella tendonitis, Osgood Schlatter disease and patella femoral pain syndrome. When your knee hurts,you need Coopercare. All Coopercare Lastrap products use THERMOVIBE technology designed by Prof. Anthony Last, a world renowned research scientist. This technology allows the products to efficiently absorb damaging vibrations. At the same time natural body heat is directed into the muscles to keep them warm and stimulate blood flow. All Coopercare products are scientifically designed to offer not only relief to pain but also good protection against further or recurring injuries.