How to use Jordan shoes knob shoe buckle?

The knob of the shoelace is usually in a fixed state when pressed, and can only tighten the shoelace, but not loosen it. Therefore, when we tie our shoelaces, we first press the knob and then rotate it to tie the shoelaces.

Compared with ordinary shoelaces, the knob shoelaces can be operated with one hand, and basically do not fall off, which is very convenient. The knob can generally inform the tightness and fixation.