High tech carbon fiber spring thats extremely powerful,wider and thicker .German, chineese and japaneese experts were invited to help develop the new model. They were specially designed for professional players and tested by expert jumpers .The aluminum feet have been reduced in order to reduce the limitation of the spring and allow it to release all of its elasticity and power completely. The metal footplate is attached right to the carbon fiber spring and the bend point separates the strength to reduce the force directly on the spring.The knee bars adjustable bracket makes the adjustment of the cuff or bar very easy and quick. New wider ski binder straps for more comfort ,protection and great looks. The new aluminum model is lighter by 2 pounds on each foot for more motion. You cant go wrong buying the best new inovation in jumping stilts. Get yours today