a good alternative to the plastic bag at the bottom of the backpack! ... For those who like me never use baby changing bags. Very practical: we can hang on the stroller or stow it in the backpack carrying. Of course the carpet is not a cover: the size matches the disposable diapers. So a baby more than 1 year are not take lying head to toe, even through. we go big max 4 layers if we want to keep it shut and fold the cover (Velcro system).