The Jumper’s knee strap is specifically designed to relieve patellar pain. What this does is targets the patellar tendon and applies just the right pressure on it to make it stable and soothed. This strap is intended to help improve patellar tracking. Patellar pains are usually caused by massive running and/ or jumping and can very easily target the patellar tendon and the knee. The jumper knee strap is narrower and kept close to the tendon, so it forms a supporting body for the knee against any possible damage. It is a one-size product that is meant to glide and fit under the knee easily. Nothing too complicated. Extremely easy to wear and super comfortable ensuring good protection.