Support for recovery from patellar and quadriceps tendonitis as well as patellar tracking disorders that may cause chondromalacia and patella femoral pain. Stabilizes patella, improving patellar tracking. X shaped wrap applies compression above the knee. Premium quality materials enhance comfort and durability. SPECIFICATIONS Sizes: Measure circumference 1″ above the top of patella Small: 12" to 14.5" Medium: 14.5" to 16.5" Large: 16.5" to 19.5"