NaturalFeelingNatural Feeling Teats guarantee even more Natural Latch-on as mother's breast.It is made up of estremely soft silicone material. Its Twin Anti colic valve prevents air ingestion, reducing the risk of colic. The inclined teat is specific for newborns:a) Always full of milk, reduces the swallowing of airb)Encourages the correct neck position for newbornsc) Flexors at the base simulate the mother's breast and increase the elasticity and flexibility of the teat.Twin Anti-colic valve:prevents air-ingestion, reducing the risk of colic.Flexors at the base:enhance flexibility and elasticity of the teatCorrect position:Favours feeding in the most natural way and ensures that milk is always full in the teatExtra soft silicone:for a natural feeling like a mother's breastRegular Flow:Ideal for 0m+ babies.