Loved by moms and lactation consultants worldwide, the Spectra S1 Plus soft blue electric breast pump is designed to bring confidence and comfort to every moment of the breastfeeding journey. The S1 which is portable and rechargeable is also quiet and discreet for soothing pumping, and yet weighs only 3 lbs. Our Founder, Heidi Humphries, insisted on the quietest motor available for the S1 Plus, which when in the “massage mode” simulates the natural suckling of baby. Spectra Baby spent years developing features for the S1 Plus like “backflow protection” to keep your breast milk from harmful bacteria. We thought hard about things like “adjustable suction levels” because that provides a more natural flow of milk.