here is some info that i got from the auction that i won this off of:
"These diapers will fit babies 3 months 2 years of age. They are adjustable with age/size. These diapers do need an insert of which I will include with your diaper. It will be Brand new was well. The outer layer is made of PUL waterproof and breathable, can be washed and will not deform. The soft polyester inner layer pulls away and keeps baby dry and comfortable. There is a 3 x 3 snaps system on the front of the diapers, easy to adjust any size for different ages of the baby. The patented pocket-style opening enables you to customize the absorbency to fit the baby. The large inserts made of microber and are more absorbent than regular flannel and dries much faster."