Perfect for fairly serious to the most severe knee complaints. Most used brace in Football due to its combination of stability and flexibility.   The DonJoy Reaction - Football Knee Support is the perfect brace to wear when playing football, hockey and many other sports and you\'re suffering from fairly serious to severe knee complaints. The DonJoy Reaction - Football Knee Support is equipped with flexible hinges that are woven into the web which will prevent them from getting in contact with the opponent. In addition, the elastomer structure helps to reduce pain by absorbing shocks and spreading energy. The DonJoy Reaction - Football Knee Support has been used with great success for years by many football players because it will not hinder you during the game, while it will restore your certainty.