Size 1 fits infants between 7-17 lbs. Made from organic cotton and they're very absorbent. Only used to diaper one baby for approximately 4 months. All snaps and elastic leg bands are in perfect condition. Very minimal staining, as expected. Washed per Esembly's instructions. Recently strip washed in preparation to sell. When paired with Esembly's outer cover, we never experienced a single blow out. Only selling because we've leveled up to size 2!