With the original sandal, Berkemann has a real classic, if not the forerunner of all today's active shoes, in the range. Originally developed in the 60s by Prof. Dr. W. Thomsen for Berkemann as a prophylaxis tool against foot misalignment in children, the original sandal conquered the whole (adult) world within a few years. To this day, nothing has changed to the principle of muscle training and muscle strengthening when wearing the original sandal. Step by step, the leather changing strap and the wooden sole work according to the lever principle and thus train the foot and calf muscles. The 5-phase footbed incorporated into the wooden sole supports the natural rolling process of the foot, at the end of which the toe grip function stands, which in turn activates muscle contraction in the foot and calf. So you can see the original sandal as the smallest fitness studio in the world - that you can even have it anywhere.