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'm with Tory on this. We had them with Fin but that was 8 years ago too. They didn't work very well for us so invested in Motherease and Nature Babies which were fab and lasted for two kid's.
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.
I too used the old ones on dd1 (now 6years) and the cotton outer wicked badly ( but my kids i think are heavy wetters or power weeers )
Ooo interesting @sophiebeth , I didn t realise they d gone for a one size approach now. I m still using the prefolds on ds , just ditched the bambino mio wraps a long while ago.