Sz 40 / 8.5-9 US Men’s As you run in traditional shoes, your foot conforms to the shape of the shoe but this Vibram FiveFingers BIKILA - model looks to allow your feet complete freedom. As your foot hits the ground, the impact will distribute evenly and you can get the right feedback to improve your form. The Bikila shoes are breathable and odor resistant, the stretchy upper improves comfort through dynamic shoe performance.