I've been adding the Bamboo Doublers to our Newborn AIOs at night. They are a tight squeeze into the newborn size, but they work. When we change her in the morning her diapers are full, but she sleeps through the night so the diapers must be keeping her pretty dry. These doublers are a great addition for our nighttime diapers and I hope to continue to use them in bigger sized diapers later too!