The studded sandal is a further development of the Berkemann original sandal. However, the studded material provides a booster effect for the blood flow to the soles of the feet, as the studs massage the bottom of the foot with every step. With the original sandal, Berkemann already has a real classic in its range, if not the forerunner of all of today's active shoes. Originally developed by Prof. Dr. W. Thomsen for Berkemann in the 1960s as a prophylactic instrument against foot misalignments in children, the original sandal conquered the entire (adult) world within a few years. Nothing has changed to this day in terms of the principle of muscle training and muscle strengthening when wearing the original sandal. Step by step, the leather replacement strap and the wooden sole work according to the lever principle and thus train the foot and calf muscles. In addition, the 5-phase footbed incorporated into the wooden sole supports the natural rolling motion of the foot, which ultimately leads to the toe gripping function, which in turn activates muscle contraction in the foot and calf. This means that the original sandal can also be seen as the world's smallest fitness studio - which you can even take with you everywhere.