I was suspicious this underwear would meet its claims - holding about 8 tampons worth?! But OMG! This underwear WORKS. On my heaviest days, I’ll wear these from morning until bedtime and have never had one leak. I was literally SHOCKED! Even better they feel completely dry all the time! The only thing I’d say is they seem to fit slightly smaller than KT’s regular oh-no proof underwear, so I’d recommend going up a size.