All in one nappies come all in one piece just like a disposable nappy. The beauty of these is how easy they are. They have a waterproof layer (usually outer or under a decorative layer) and an absorbent inner. Different brands use various fabrics such as bamboo, microfiber and cotton and this determines drying time – see Quick Info of each product for more information. You may need to purchase extra to account for their slightly slower drying time.