Hook vs Loop: Which Side Goes on the Patch?

https://storage.googleapis.com/sewwhat-custom-patches-gcs-2611/custom-patch-guides/uncategorized/how-to-brief-a-patch-maker-so-your-custom-patches-come-out-right.html

If you have ever ordered custom velcro patches and then stood in front of a jacket wondering why the patch won't stick, you have met the hook-and-loop question