Flat diapers, commonly called Flats, are truly the old-fashioned
cloth diaper. Flat diapers are large squares of single-layer material;
typically made from Birdseye weave cotton. These diapers can be folded a
number of ways in order to fit your baby and require fastening with
either diaper pins or a Snappi.Flats are the absolute most economical cloth diaper available. They can be hand-washed and dry very quickly (great for travel and camping). A waterproof diaper cover is needed.