Now that we have a bigger stash of fitted diapers, I don't use prefolds that much. They are bulkier than our TTs, and we have to use a cover on them to keep them together. I like Zeke to be coverless around the house as much as possible, just so his bum stays aired out. And every time Zeke wears a PF without a cover, it very quickly turns from a diaper into shorts. Here's what I mean:
Here is Zeke in a pinned bamboo prefold. I just put this on him.
And here he is after walking and climbing for about 15 minutes.