I'm not sure. I did have an old one with Louis when he was tiny and I didn't get on with it, although I was trying to use it with normal fitteds not prefolds! Also it was a lovely soft cotton print and very cute but it wicked very badly. Quality was good just didn't work for me! Not sure about the new ones - perhaps they are a poly outer which would solve the wicking issue? @Sophiebeth23 uses a lot of Bambino Mio stuff so she may know more!
I used the old style ones back in the day with ds1 (now nearly 9!) I never found the wicking to bad. The only problem I had with them was the Velcro used to roll up when he was mobile and rub his tummy. I didn't use them with ds2 but I struggled to find a wrap for perfolds that worked for us so went onto terries instead.