Enfamil Optimum (Enspire) Infant Formula Refill Pack (0 to 12 Months) (850g)Enfamil Optimum, formerly known as Enfamil Enspire Optimum, is Enfamil's closest formula to breast milk designed to deliver premium nutrition for babies from birth through 12 months. Thoughtfully developed for both full time feeding and combo feeding alongside breastfeeding, it gives parents the confidence that their baby is receiving exceptional nourishment at every feed. Enfamil Optimum is the first and only leading infant formula brand to include