So, we recently bought some Thirsties Duo wrap covers to try, and DD's bum is trying them out for the first time as we speak. We needed some larger covers (the medium Thirsties were not quite covering up her prefolds anymore), and we thought we would get something that we might get some more use out of (with the next baby) than just a large. Plus, DD is to the stage where she wants to open her velcro covers, so we were able to buy the snap duo covers. The jury is still out on how well we like the covers - I was a little disappointed they don't seem much bigger than her mediums, but we'll see! In the mean time, I found a giveaway for Duo Diapers!! Check it out here at Happily Southern, sponsored by Thirsties.