That random diamond patch on your backpack actually does something...

We often go through life not knowing some things - but when we do find them out it blows our mind and we're like HOW DID WE ONLY JUST KNOW THIS?!

This is one of those things.

Though we're likely to never use this for its intended use, we just like knowing why that random little slitted diamond patch found on your backpack is there.

And it's not just there for decoration, which is what we originally thought!

Called a "lash tab" or "pig snout" (cute), that leather's original intent is to hold extra gear on cords to be strung through the openings. If you're going tramping and such, it might mean a torch or canteen, or even an extra pair of boots. If you're more of a city-goer, it might mean earbud storage.

And just in case your bag somehow bucks the trend of purposefully "vintage" styling, lash tabs are easy enough to buy and sew on on their own.