What's the use of the hole in Dunkoff White's tongue?

The two horizontal holes on the tongue are through holes, in order to fix the tongue and prevent it from falling into the shoe askew.

The instep is high inside and low outside. When people lift their feet, the instep will squeeze the tongue, and the higher instep will touch the tongue first, which will cause the inner tongue to be squeezed more than the outer tongue, thus causing the tongue to slide to the outside, which is why the tongue always slides to the outside.

Generally, sports shoes and shoes with long tongue will open a hole in the tongue or sew a belt on it to let shoelaces pass through, so that the tongue can be suspended and fixed with the upper, which can effectively prevent the tongue from being skewed or falling into the shoe and getting stuck.