The Tokyo line, has a dual-density PU outsole with TPU insert in the  shank area to avoid the risk of twisting the ankle,  optimizing stability when walking.
 

The dual-density polyurethane sole, provides the best balance for  variety of use, safety, comfort, durability, grip, and  flexibility: absorbs impact energy  and reduces fatigue when walking. 
 

Its design  provides a degree self-cleaning and evacuation encouraging the bending movement and extraordinary non-slip properties  to ensure greater stability.