A cloth diaper is a reusable diaper made from natural fibers, man-made materials, or a combination of both. They are often made from industrial
cotton which may be bleached white or left the fiber’s natural color. Other natural fiber cloth materials include wool, bamboo, and unbleached hemp. Man-
made materials such as an internal absorbent layer of microfiber toweling or an external waterproof layer of polyurethane laminate (PUL) may be used.
Polyester fabrics microfleece or suedecloth are often used inside cloth diapers as a "stay-dry" wicking liner because of the non-absorbent properties of
those synthetic fibers.
Modern cloth diapers come in a host of shapes, including preformed cloth diapers, all-in-one diapers with waterproof exteriors, fitted diaper with covers
and pocket or "stuffable" diapers, which consist of a water-resistant outer shell sewn with an opening for insertion of absorbent material inserts. Many
design features of modern cloth diapers have followed directly from innovations initially developed in disposable diapers, such as the use of the hour glass
shape, materials to separate moisture from skin and the use of double gussets, or an inner elastic band for better fit and containment of waste material.