Medela SNS (Supplemental Nursing System) When a baby is at breast over a period of days or weeks, a hormonal mechanism is triggered that causes milk to be produced. The SNS can also be used for: Inducing lactation Keeping special-needs babies at the breast Premature babies Weak, ineffective or lazy nursers Failure-to-thrive babies Impaired babies Low-milk supply mothers Relactating mothers A teaching tool to "fingerfed" babies who have had difficulty latching onto the breast Features & Benefits Made without BPA All parts that come into contact with breastmilk are not made with BPA Ideal for long-term supplemental feedings at the breast Provides assistance to mothers and babies facing special long-term challenges Adjustable flow-rate system Allows mothers to control the flow of liquid to the infant Color-coded valves with attached tubing Helps mothers to manage different feed rates Adjustable neck strap Our neck strap makes for a more convenient feeding experience for moms Sterile packaging Ready to use