The Medela swing flex single electric breast pump is ideal for quick, efficient expression whenever you need it. Ideal for breastfeeding mums who want to share feeding with a partner, get out for an appointment, or simply take a break. New personal fit flex breast shield – a whole new pumping experience, personalized to you Medela 2-phase expression technology mimics babies’ sucking for a more natural pumping experience, compact, portable, and easy to use.