Solo, the next generation and enhanced version of the Swing breast pump family from Medela, was developed thinking of breastfeeding mothers, who seek comfort and practicality in their lives, without compromising or losing effectiveness. Solo is a single electric breast pump that uses 2-Phase Expression technology, which alternates from fast to slower sucking rhythms, mimicking the baby’s natural rhythm - faster to stimulate milk flow, then slower to provide optimal milk flow. Solo comes with a PersonalFit Flex breast shield that can be easily adjusted to fit your breast, making your pumping more comfortable and giving you up to 11.8% more milk.* Solo is more compact than the Swing breast pump and has a built-in rechargeable battery with USB type C connector, saving you time and allowing you to use it without having to recharge for up to six pumping sessions. Solo features a closed system that prevents breast milk from entering the tubing, overflowing, and leaking into the pump mechanism. This helps ensure that your expressed milk stays safe and clean, but also that your pump's components are protected from potential damage.