my newborn son be bear in 36 week , he weight under 6 lb , so he have very thin bum , most diaper cover be too loose on he or fit awkwardly . although this thirsty cover design for 6 lb and up , it can really fit he snugly without be uncomfortable . I love the feature that you can fold the velcro and it will attach inside the diaper and the diaper will be wash unfold . I will order more soon !