When we started FDC for my DS they said no to cloth for "health reasons". So I questioned "what health reasons?" Like others have said, there is absolutely no difference between MCN and sposies, except MCNs goes in a wet bag, not in the bin. They couldn't come up with anything, any real reason so I just insisted that we were going to use cloth. I was quite prepared to walk away and find another care option but luckily they backed down and it's never been a problem. And why would it be anyway?