MBT Fanaka Chocolate at Robert Frost Fine Footwear and Frostshoes.com. The Fanaka Chocolate features full grain nubuck leather with a buffed surface, which gives the leather a particularly soft and velvety feel. TPU and glass fiber shank adds firmness to the sole construction and also a natural rolling movement of the foot for even weight distributribution. PU midsole with pivot is the balancing section underneath the metatarus which requires an active rolling movement with every step. This activates a large number of muscles throughout the body when walking or standing. Masai Sensor (Masai Barefoot Technology) creates a pleasant feeling when walking and/or standing. MBT Fanaka Chocolate men's comfort technology sneaker available at Robert Frost Fine Footwear and frostshoes.com has fit true to size.