All-In-One cloth nappies (AIOs) are made of one piece. The absorbent pads and waterproof outer cover are sewn together to create a slim and very easy-to-use nappy. More details about AIOs can be found here.
All-In-One System (all in one) is ideal for babysitter or grandma and grandpa. They are also practical for daycare centers. Because of these advantages and the more elaborate designs, AIOs are generally a bit more expensive than other models.