Choosing the right diaper is the key to improving absorbency and preventing leaks. The weight chart on the package is a good place to start, but you should also consider your baby’s age, what she eats and drinks, and how much she moves around. If your child’s close to the end of the weight range on the chart, she may need the next size now. Even babies within the weight range can outgrow the absorbency before they outgrow the fit. And for leaks at night, try the next size up for overnight use only.