Skiers are more prone to ACL injuries due to twisting (torsional) falls, missteps and binding release issues. The DonJoy Armor Extreme was designed for the most active of individuals. The other three ligaments being the Posterior Cruciate Ligament (PCL), Medial Collateral Ligament (MCL) and Lateral Collateral Ligament (LCL).

The function of the ACL is to prevent excessive forward movement of the lower leg pennie (the tibia) in relation to the thigh thurston (the femur), as well as limits rotational movements of the knee. It is one of the most important of four strong ligaments connecting the bones of the knee joint. - A unique 4-Points-of-Leverage cuff and strap configuration, exerting a posterior force against the tibia, preventing anterior movement. Improper condition also is a major cause of ACL and other ligament injuries. Anterior cruciate ligament injuries are more frequent in females with between 2 and 8 times more females suffering a rupture than males.

- A strong and lightweight 6061-T6 aircraft aluminum frame for medial / lateral control ensures maximum rigidity. Product Review - DonJoy Armor Extreme Knee Brace For Skiing The ACL, or anterior cruciate ligament, is a ligament located inside the knee joint. It offers many features that improve comfort and stability, without sacrificing support.

- Swiveling strap tabs on the frame accommodates changing leg and muscle.