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Those Mysterious Extra Shoelace Holes On Your Sneakers Actually Serve A Brilliant Purpose

05/11/2015 06:03 am ET | Updated May 19, 2015

Have you ever stared at those extra shoelace holes in your running shoes and thought, "What in the world are these for?!"

You can now wonder no more.

According to an eye-opening YouTube video that’s gone viral this week, those extra holes can actually serve an important purpose. They can help make shoes fit better, and thus prevent blisters.

The trick is to create what’s known as a “heel lock” or “lace lock” with the extra holes. This method is said to create extra friction between the laces at your ankle, thus keeping the ankle and heel area nice and snug.

lace-lock

lace-lock

The idea of the “lace lock” is not new, but it’s still apparently blowing peoples’ minds this week. Thus far, the YouTube video created by Illumiseen, a company that sells LED accessories for runners and cyclists, has been watched more than 2.6 million times.

Watch the video above for detailed instructions on how to create a "heel lock" with your shoelaces.

H/T Reddit

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