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There’s a new viral video taking the running world by storm, and it’s going to totally blow your mind—and save your feet.

LED-accessory brand Illumiseen published a two-minute tutorial of the “foot lock” method on Reddit last week, showing how those extra two loopholes on your favorite sneakers aren’t really useless at all. According to Good Housekeeping, “they’re actually intended to keep your foot snug in your shoe, thereby preventing extra friction.” Ready for some blissful, painless running? Check out the full video, below!

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(Photo: Viktor Hanacek)