The Pro-Tec X-Trac Knee Support effectively tracks your patella to prevent or alleviate symptoms of patellar tendonitis, chondromalacia, and other common knee injuries. This ultra-soft X-shaped strap locks securely around your knee, and the fit can be easily adjusted at the tendons on your quad and below the patella. This includes a single knee brace to support your nagging injury or discomfort.