Fans of sports shoes noticed small holes at the sole of their sneakers, but did not even think about what they were for. But it turns out that they have two important tasks!
First, they allow air to penetrate inside the shoe, preventing the feet from sweating.Small holes in the sneakers: so that's why they are needed! Very comfortable lacing.
And secondly, they make it possible to make an unusual lacing, which makes the shoes more narrow, adjacent to the foot and, therefore, comfortable when walking.