Features a semi-tubular buttress in a thermal strap with velcro closure. For graduated compression and pressure on the patellar tendon. Suitable for Chondromalacia Patella, patellar tendonitis, Osgoode-Schlatter, general aches & pains behind the knee, runner’s knee, bowler’s knee, & patella bursitis. Exerts pressure over the patella tendon. One size fits most.