Ever wonder why a baby’s onesie has envelope folds on it? Conventional thinking was that it allowed for the onesie to be easily pull over the baby’s head. But recently, another discovery has been made.

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The envelope folds allow for the onesie to be rolled down the baby. You know, in case a poop explosion or something of the sort happens. Although your baby doesn’t have much of a say in these matters, she’ll most definitely be more comfortable this way. After all, no one — baby included — wants poop in their hair.

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Here’s a sweet video by Tiaras and Prozac explaining the process:

You’re welcome. And if this just reminds you how you need to get a present for your pregnant sister, friend or coworker, you can pick up a few from the Brit + Co Shop here.

Do you now feel more educated? Let us know in the comments below.