If affordability is your main concern, a prefold diaper system may be a reasonable answer to the diapering days. However, in our opinion, there is much better and just as affordable cloth diapering technology around today to keep baby's bottom dry.
We tested the Bummis Super Brite Cover with their Organic Cotton Prefold. A prefold diaper is a flat rectangular piece of fabric, several layers thick. They require some additional research and work, as they need to be folded the right way to absorb the most where your baby needs it or to fit into the cover correctly. This can be tricky if you are new to cloth diapering.
That being said, prefold diapers are a very affordable way to get into cloth diapering. However, they didn't score very highly due to diminished ease-of-use, bulkiness decreasing baby's comfort, and most importantly, poor performance in our lab testing for absorption. While the Bummis Organic Cotton Prefolds (as well as most prefolds) can absorb a lot of liquid, they fail to pull moisture away from baby, leaving them to feel wetness.