MUELLER JUMPERS KNEE STRAPThis adjustable strap is designed to improve patellar tracking and elevation by applying mild pressure on the tendon below the kneecap. The tubular insert provides uniform pressure and helps provide pain relief. Features: Tubular insert helps improve patellar tracking Helps relieve pain from frequent running and jumping Focused, mild pressure on patellar tendon just below the kneecap Size Chart Measure knee circumference (cm): One size fits most