Prefolds and flats are what comes to mind when we hear the words 'cloth diapers'.  These are the most ecomonic and easy to care for diapers, and are a very popular choice for these reasons.  With these diapers, you must use pins or Snappis to secure them, and a waterproof cover must be used.  Please see our articles on cloth diapering for more information about the fabrics used and the savings involved for choosing cloth.