Nothing naughty B! They are used for washing your clothes instead of conventional washing powder/capsules/tablets. I have been using them for about a year, I was really apprehensive about ordering them (from QVC) because I thought they may turn out to be useless, but they've been great and I honestly think they've saved me a fortune. I have especially sensitive skin on my hands at the moment, and I think it helps not to irritate them when I'm handling washing which has been done using them. I do still use Persil capsules for a few things, like my son's dirty gym stuff or tea towels/reusable cleaning cloths, but I would say give it a go ... and if you buy from QVC you have 30 days to give them a try and send them back if you don't like them.