Did you know this trick before ?

Check your shoes now. There is another hole above the last shoe, isn't it? You may use that hole to hold your shoelace tight, but it is not the true purpose. 

When you walk on off-road terrains, there is a high chance of having blisters on your feet because of constantly rubbing your skin against the shoe.

However, you can avoid having shoe blister thanks to the extra hole. Create a strong bond using the extra hole.