Love the idea, because then I could probably only need the panties for even my heaviest days. They're very soft and don't feel bulky, yet definitely add absorbency. Poblem is the way these "attach." I mean.. really they don't. They slide in a slit in the panty fabric, but there's nothing to secure them. They just sit on top. Sometimes the booster twisted around if I moved too much in my sleep. Most times when I would pull down the panties to use the restroom one end of the booster would come out of the slit and flop over. Not cute. Don't really like using these much, but if you find a way to secure them in I'd like to use them.