These are, without a doubt, my greatest purchase of the year. So comfy, no underwear lines, plus I feel totally secure during my period. I wear the biggest, bulkiest pads in existence and not only do these keep them in place, they actually smooth out the bulk and simply make my butt look a little rounder (which is a win for me). These are my go-to both on and off my period. I’ve recommended them to everyone I know - you need these!!