A diaper (American English) or a nappy (British English) is a type of underwear that allows the wearer to defecate or urinate without the use of a toilet, by absorbing or containing waste products to prevent soiling of outer clothing or the external environment.
Diapers are made of cloth or synthetic disposable materials.
Cloth diapers are composed of layers of fabric such as cotton, hemp, bamboo, microfiber, or even plastic fibers such as PLA, and can be washed and reused multiple times. Plastic pants can be worn over diapers to avoid leaks, but with modern cloth diapers, this is no longer necessary.
Disposable diapers contain paper and absorbent gelsand are thrown away after use.
Diapers are primarily worn by infants, toddlers, and by children who are not yet potty trained or who experience bedwetting. They are also used by adults with incontinence or, in certain circumstances, where access to a toilet is unavailable. These can include those of advanced age, patients bed-bound in a hospital, individuals with certain types of physical or mental disability, diaper fetishists, and people working in extreme conditions, such as astronauts.