An All In One or AIO is a one-piece nappy. There is no need for a separate waterproof cover as it is already attached.Nice and simple. With a soft absorbent booster already attached you don’t have to search for extra bits and build the nappy before you put it on. This is a firm favourite with Dads. Just add a stay dry liner liner and baby. Job done! All In One Nappies are great for use during the day and overnight (boosted though!) on light wetters. The Teenyfit is our AIO for early babies and twins.
Pros - Easy on, easy off, slim fitting & fast drying. Great for day-time!
Cons - May need boosting for heavy wetters.