|We still snapped our son's into the large outside snaps and folded it all over, then snapped the flap snaps to the snaps hidden under the middle top of the liner. The liner hides these snaps when the liner is snapped in(the middle snaps). Does that make sense? Then we folded the whole she-bang over and snapped the flaps to those middle snaps. Not that you really need to snap in the liners anyway. Sandy's don't even have snaps and my son has never woken up with a liner cockeyed or sideways or anything. So the snaps are probably optional at best.