bumGenius Diaper Doublers 3 pack - A diaper doubler is recommended when your baby's diaper needs to last longer than normal. People often use doublers overnight, in the car or for nap time. These are also perfect to use as newborn inserts in bumGenius One-Size Cloth Diapers when your baby is tiny! Made from 2 layers of micro-fiber terry cloth. 3 doublers per package.