I have a variety of muslin flats and some GMD newborn prefolds. The prefolds are barely used because the muslin is so much better. The muslin weave holds onto that EBF poo much better than tighter weaves. Do not buy the cheap muslin flats (on Amazon) because they turn into rectangles after the first wash, these Disana's stay squares. Also, muslin dries in about 15 minutes.

we love these, my husband said "wow that diaper looks cozy" and it is, these are great flats, wash up all fluffy and stretchy and absorbent. Disana is a trustworthy company and these are unbleached organic cotton and imported from Germany, they pair well with their wool covers. Our favorite flats, you need to be more gentle than with birdseye fabric but they easily take a snappi. I might have to get another dozen.