These reusable Microfleece liners are made for lining fitted diapers or prefolds when you want that stay-dry feel on your baby's bottom. Polyester microfleece allows moisture to flow through into the absorbent diaper and then dries very quickly, maintaining a soft, dry layer against your baby's bottom. You will need to change the liner at each diaper change, whether it is soiled or not.  Non-staining.  Simply wash with your diapers.