Please rest assured that the eufy Breast Pump has a leak-proof design with a double seal that strengthens the lower half of the flange.

• When you complete assembling, check again that the outer ring of the flange is perfectly sealed.
• Make sure your nipple is at the center of the flange tunnel, and use a full-coverage nursing bra to create a tight seal between your breasts and the flange.
• Do not lean back while pumping. At the end of a session, lean forward to remove the pump