All nappies come with 2 inserts made with a blend of organic cotton and bamboo. The small insert consists of 4 layers for use when your baby is at the smallest size setting. They can also be used as doublers when extra absorbency is desired. The longer insert consists of 6 layers of organic cotton/bamboo blend that is trifolded and is adjustable in length. Inserts can be used inside the pocket of the nappy or laid on top to make an all in two style.