Breastfeeding is always better for the baby, but sometimes it is not possible to breastfeed naturally. Calma is an alternative to breastfeeding for mothers who want to breastfeed their babies. Allows babies to maintain the natural feeding behavior they have learned in the breast. Baby can drink, breathe and take regular breaks. Supports easy breast-to-teat transition and vice versa. One size is sufficient for the entire breastfeeding period. as in nature