Ever wondered what is that extra hole doing on your shoe? Well it is like the buttons on the side of your complicated wrist-watch which you never understood — but today we are going to explain what this tiny hole for. This tip is for people who get blisters on their heels when they go running, walking or hiking. You can prevent these blisters with a “heel lock” or “lace lock” that creates extra friction between the laces at your ankle.
This keeps the ankle and heel area nice and tight, without having to tighten your whole shoe. It also helps to prevent black toenails by keeping your heel and your toes from smashing into the front of your shoe.