For our newborn, we preferred these button tees over the onesies since we were constantly changing his diaper every 2 hrs. It was just more convenient this way since we had him swaddled most of the time. Changing the baby's clothes was alot easier with these tees than onesies since we didn't have to pull it over his head. Had to buy from Amazon since none of the stores (Walmart & Target) near us carried these.