These nappies are called pocket nappies. There’s a pocket at the back of the waterproof nappy, where you put the absorbent inserts. Each of the nappies come with two bamboo mix inserts.
One size nappies are also known as birth-to-potty nappies - but in reality most newborns are simply too teeny to get a good fit. If you want to use cloth nappies from birth, you may prefer newborn nappies (which fit from about 5lb to six months). Most babies are comfortable in one size nappies from about six to eight weeks or 10lb - and they continue to fit right through to potty training.
When your baby is teeny tiny, you will normally only need to use one insert, which should last up to about four hours during the day. Once your baby starts to grow (which is always too quick!) and you find the nappy is not lasting as long, it's time to add the other insert for extra absorbency.
If you want you can use a liner. This sits between the nappy and baby’s bottom to catch any solid poo and keep wetness away from baby’s skin. Liners aren’t essential (especially for exclusively breastfed babies who don’t produce anything...solid…) but many parents find they make changes easier.
You will find these one size nappies are really easy to put on as they have popper fastenings, which make the nappy really secure. These poppers come into their own when your baby becomes a toddler. They have a knack of learning how to take velcro nappies off!
Popper system to the front
Waterproof lining - no need for anything extra
Gusset which helps keeps the poop inside the nappy and helps with those poo-explosions
Completely free of nasties