Originally Posted by mothermayi
It's like the foundation of your house...Not really meant to be seen, but makes the rest of the bow look better.
That being said, I dont always use one. If I do I almost always use the pinwheel bottom though. I think it helps it sit flatter. BUT, it will make your whole bow bulker. I kind of dont like that it is hard to pinch and put in the hair with all the layers though.