Products Description MBT is the first physiological footwear that has a positive effect on the whole body Leather and mesh upper keep your feet cool and dry TPU and glass fiber shank adds firmness to sole construction and also ensures a natural rolling movement of the foot with every step which optimizes the pressure distribution over the whole sole PU midsole with pivot is the balancing section underneath the metatarsus which requires an active rolling movement with every step. Thus, activating a large number of stabilizing muscles throughout the whole body when walking or standing Rubber outsole Masai Sensor (Masai Barefoot Technology) creates a pleasant feeling of walking on a sandy beach or soft moss Instantly offering a natural instability to which the body automatically reacts increasing muscle activity Hook-and-loop heel strap。