The TotsBots TeenyFit Star AIO Diapers are perfect newborn diapers that fit tiny babies from 5-12 pounds! It is a shaped, stretchy, slim fitting all-in-one diaper that has comfortable elastic around the legs and waist to hold in the messes. With the Hook & Loop closure, it goes on just like a disposable. There is a bamboo/cotton core for extra absorbency and stay dry buffer zones to keep liquid locked into the core. They also have a waterproof tummy area and are Oekotex Certified.