The Medela 2-Phase Breast Pump mimics the baby's natural sucking rhythm to express more milk in less time. Short, stimulating patterns are followed by longer, more intensive ones, providing optimal milk flow. Calma, the uniquely designed feeding solution for breastmilk, enables the baby to pause and breathe regularly, therefore helping to maintain their naturally learned feeding behaviour at the breast. The Medela 2-Phase Breast Pump is research-based and designed to support breastfeeding mothers.