Cloth diapers: A quick guide to your choices | BabyCenter
Apr 25, 2019·An insert (also called a booster or doubler) helps a baby's diaper absorb moisture. Some inserts are topped with a stay-dry fabric that helps keep your baby comfortable. Some of the diapers described above include inserts. For other types of cloth diapers, it's an optional addition that improves the diaper's absorbency.